Clean Timber Holes From 12–25mm

P&N Spade Bits provide five useful drilling diameters for timber plus light building materials in one compact set.

The P&N 5pc Spade Bit Set covers 12mm, 16mm, 18mm, 20mm plus 25mm, giving each bit a clearly defined hole diameter for installation work.

P&N specifies the range for cable, window plus pipe installation, with spur cutting edges designed to reduce splintering plus produce a smooth, clean hole.

A hex shank provides positive grip to help prevent slippage in the chuck, while the hole in each spade bit can be used for pulling wires back through a completed opening.

For the power tool behind the bit, explore Drills & Drivers. For other drilling accessories used around the same work, Drill & Driver Accessories keeps related equipment close.

► 5pc P&N Spade Bit Set
► 12mm, 16mm, 18mm, 20mm plus 25mm
► Designed for timber plus light building materials
► Spur cutting edges
► Hex shank
► Wire-pulling hole
► Carbon steel construction
► Suitable for cable, window plus pipe installation

Start with the opening required, choose the matching diameter & keep the bit centred on the timber drilling task.

Five Diameters Cover the Set

P&N's 166044647 Spade Bit Set contains:

► 12mm
► 16mm
► 18mm
► 20mm
► 25mm

That five-size progression is the core of the product.

There is no need to turn it into a broader spade-bit family when the set itself already defines exactly what is supplied.

Choose the bit from the required hole diameter rather than simply reaching for the largest or smallest option.

Timber Is the Main Drilling Material

P&N specifically describes these spade bits as designed for drilling in timber plus light building materials.

That product boundary matters.

Spade bits have a very different cutting form from conventional twist drills, masonry drills plus metal-drilling bits.

Keep them matched to their intended drilling work.

For other P&N drilling geometries used across different materials, P&N Drill Bits provides a useful neighbouring range.

Spur Cutting Edges Help Control the Hole

P&N specifies spur cutting edges designed to reduce splintering plus ensure a smooth, clean hole.

That feature gives the working edge a clear purpose when the bit enters timber.

The correct diameter still matters.

So does accurate positioning.

Before drilling, establish:

► Required hole diameter
► Hole centre
► Drilling direction
► Workpiece position
► Clearance around the exit point

For setting out drilling positions accurately, Measuring & Marking provides useful supporting equipment.

The Hex Shank Helps Keep the Bit Secure

Each P&N spade bit uses a hex shank.

P&N specifies this design for positive grip, helping prevent slippage in the drill chuck.

That gives the set another practical distinction from round-shank drilling accessories.

The shank still needs to be fitted correctly.

Before drilling, make sure the bit is properly secured plus the drill setup is ready for the work.

The hex profile supports grip.

Correct installation remains part of the setup.

Cable Installation Is a Defined Application

P&N specifically lists cable installation as one of the intended uses for these spade bits.

That makes the set relevant where appropriately sized openings need to be drilled through suitable timber plus light building materials for cable routes.

The required opening should determine the bit diameter.

Do not make the hole larger than necessary simply because a larger spade bit is available in the set.

Confirm the cable-routing requirement first.

Then select from 12, 16, 18, 20 or 25mm.

The Wire-Pulling Hole Adds a Second Function

P&N includes a hole for pulling wires through holes in the spade-bit design.

Once the drilling operation is complete, that feature can assist with pulling wire through the opening.

It is a simple detail, but one directly connected to the cable-installation application P&N specifies.

The sequence stays logical:

Mark → Drill → Complete the Hole → Pull Wire

Use the feature for its intended purpose rather than treating the bit as only a cutting accessory.

Window Installation Is Also Within the Intended Work

P&N identifies window installation among the applications for the set.

The useful feature here is not a specialised “window bit”.

It is the ability to choose between five hole diameters while working in suitable timber plus light building materials.

That distinction keeps the product description accurate.

The same five bits serve different installation requirements according to the opening needed.

Pipe Installation Adds Another Practical Use

Pipe installation is also specifically listed by P&N.

Again, diameter comes first.

Determine the opening required for the installation before choosing the spade bit.

The set provides:

12 → 16 → 18 → 20 → 25mm

Those sizes give several options without implying that the set covers every possible pipe diameter or installation requirement.

Where the required opening sits outside the supplied range, select a more appropriate cutting tool rather than forcing one of the five sizes to fit the job.

Carbon Steel Construction Keeps the Specification Clear

P&N states that these spade bits are made from carbon steel.

That is the manufacturer-backed material specification for the set.

There is no need to add unsupported coatings, proprietary steel grades or fabricated durability technologies.

The relevant product facts are straightforward:

Carbon steel construction

Spur cutting edges

Hex shank

Wire-pulling hole

Those features define the P&N set far better than generic performance language.

Choose the Diameter Before the Drill Starts

A spade bit creates the opening selected by its diameter.

That makes size selection one of the most important decisions in the setup.

A useful sequence is:

Installation Requirement → Hole Diameter → Spade Bit → Hole Position → Drilling Setup

Do not reverse that process by selecting a bit first plus trying to make the installation suit the resulting hole.

The opening should follow the work.

The bit should follow the opening.

12mm Handles the Smallest Opening in the Set

The 12mm spade bit is the smallest diameter supplied in P&N's 5pc set.

Use it where the required opening calls for 12mm.

Its position within the set is useful because it provides a clear lower boundary.

The set does not begin at 6mm, 8mm or 10mm.

It begins at 12mm.

For smaller conventional drilling requirements, choose a drilling product designed around the diameter plus material involved rather than treating the spade-bit set as universal.

16mm & 18mm Fill the Middle of the Range

The 16mm plus 18mm spade bits provide two intermediate options between the 12mm starting point plus the larger 20mm/25mm sizes.

That helps avoid unnecessary jumps in hole diameter.

If 16mm is required, use 16mm.

If 18mm is required, use 18mm.

The presence of both sizes is useful precisely because hole diameter should follow the installation requirement.

20mm & 25mm Provide the Larger Openings

At the upper end of the set sit the 20mm plus 25mm spade bits.

These provide the two largest diameters P&N supplies in this particular 5pc configuration.

They should still be selected according to the required opening rather than being treated as the default choice for faster material removal.

Larger diameter changes the hole.

That makes accurate selection just as important at 25mm as it is at 12mm.

Mark the Hole Centre Before Drilling

Spur cutting edges can help produce a clean hole, but the bit still needs to start where the opening belongs.

Mark the required centre accurately.

Where several holes form part of the same installation, establish the layout before drilling the first one.

Check:

► Position
► Spacing
► Diameter
► Material
► Drilling direction
► Surrounding services plus obstructions

A clean hole in the wrong location is still the wrong hole.

Know What Is Behind the Drilling Point

Cable, pipe plus installation work can involve concealed areas.

Before drilling through an installed building component, establish what is behind the intended hole wherever required.

Do not assume an unseen area is clear simply because the front face looks unobstructed.

The P&N spade bit controls the opening.

It cannot identify concealed services or structures behind the work.

Planning the drilling path remains part of the job.

Support the Timber Appropriately

The workpiece needs to be stable before drilling begins.

Where loose timber is being drilled, use an appropriate workholding setup for the operation.

Avoid improvised supports that can move while the drill is under load.

The spade bit should remain aligned with the intended hole rather than following movement in the workpiece.

A stable setup supports both positioning plus control.

Consider the Exit Side Before Breaking Through

Before drilling through a piece of timber, consider where the bit will emerge.

Make sure there is suitable clearance behind the work.

Do not allow the bit to exit directly into a surface, tool, cable or other object that should not be drilled.

The complete drilling path matters.

That means checking both the entry point plus what sits beyond the material.

Keep the Bit Working in Its Intended Material

P&N specifies timber plus light building materials.

Do not extend that wording into unsupported claims for steel, concrete, masonry or other materials simply because the bit can be fitted to a drill.

The tool connection does not determine material compatibility.

The cutting geometry plus manufacturer specification do.

For dedicated masonry plus concrete drilling equipment, Concrete Cutting & Drilling Tools keeps those applications separate.

Check the Cutting Edges Before Starting

Inspect the spade bit before it enters the work.

Look at:

► Spur cutting edges
► Main cutting area
► Hex shank
► Wire-pulling hole
► General condition

If the bit is visibly damaged or behaves unexpectedly, address the issue before continuing through multiple holes.

The condition of the drill matters too.

For warning signs around powered drilling equipment, 7 Signs Your Power Tool Needs a Service Before It Fails on Site provides useful maintenance guidance.

Keep the Five Sizes Together

A five-piece set is most useful when all five diameters remain identifiable plus ready to use.

After the work is complete:

► Check each bit
► Remove loose material where appropriate
► Keep the sizes identifiable
► Separate damaged bits from serviceable ones
► Return the set to organised storage

For keeping drilling accessories plus other smaller equipment in order, Tool Storage & Organisation provides practical storage options.

A Spade Bit Does Not Replace Every Drill Bit

The P&N set has a defined purpose.

Its strength comes from staying within that purpose rather than being described as an all-material drilling solution.

Use the spade bits for their specified timber plus light-building-material work.

Use another drill geometry where the material, diameter or hole requirement calls for something different.

For a wider perspective on selecting useful equipment rather than accumulating the wrong tools, The Apprentice's First Tool Kit: What You Actually Need provides practical supporting guidance.

Five Checks Before Selecting a P&N Spade Bit

Keep the decision centred on the hole:

► Material — timber or suitable light building material?
► Diameter — 12, 16, 18, 20 or 25mm?
► Position — where does the hole need to start?
► Path — what sits behind the drilling point?
► Setup — is the drill plus workpiece ready for controlled drilling?

Once those checks are complete, the correct bit within the five-piece set becomes much easier to identify.

For a broader view of keeping working equipment dependable between jobs, A tool is not just a tool. It’s a promise. covers practical tool-care thinking.