Fast Timber Boring in an Organised 8-Piece Set

A 25mm hole through timber framing calls for a very different cutting tool from a 5mm pilot hole. Sutton Stack-In spade bits are built around larger-diameter timber boring, giving electricians, plumbers, carpenters, builders & installers a practical selection for penetrations through timber & suitable light building materials.

The Sutton D501S08B SupaBore Stack-In set contains eight sizes from 12–32mm, combining purpose-made spade-bit geometry with a portable Stack Pack case. Carbon-steel construction, a manganese phosphate coating, power chip-breaker edges & heavy-duty shanks support demanding cordless-tool use.

For complementary timber drilling gear, browse Drill Accessories, compare Drill Bit Sets or equip broader building work through Carpentry Tools & Fasteners.

Eight Sizes That Cover a Useful Spread

More isn't always better. With spade bits, having the right diameter for the penetration matters far more than filling a case with sizes that rarely leave their slots.

The Sutton D501S08B Stack-In set includes:

► 12mm
► 14mm
► 16mm
► 18mm
► 20mm
► 22mm
► 25mm
► 32mm

That spread covers a useful progression from smaller timber holes through to substantially larger service penetrations.

An electrician routing cable through framing may reach for a different size from a plumber creating clearance for a service. A carpenter preparing timber for hardware has another requirement again.

The job determines the diameter—not the fact that a larger bit happens to be available.

Why SupaBore Spade Bits Belong in Timber Kits?

Speed matters when dozens of framing penetrations are waiting.

Unlike conventional twist drills, a spade bit uses a broad, flat cutting form designed to remove material across a larger hole diameter. Sutton specifies its SupaBore range for drilling timber & light building materials, putting these bits firmly into construction, installation & woodworking territory.

The D501S08B set brings several practical features together:

✔ Carbon-steel construction
✔ Power chip-breaker edge
✔ Heavy-duty shank
✔ Hex-shank format
✔ Manganese phosphate coating
✔ Eight diameters from 12–32mm
✔ Stack Pack storage case
✔ Part of Sutton's modular Stack-In system

These characteristics make the set particularly relevant when larger holes need to be produced with portable power tools rather than stationary workshop machinery.

Where a Stack-In Spade Bit Set Earns Its Keep?

Electrical Rough-In

Cable routes don't appear by themselves.

Timber studs, noggins & framing members can require appropriately positioned penetrations before wiring moves through the structure. A multi-size spade-bit set gives electricians several diameter choices without relying on one oversized bit for every cable route.

Planning the hole before drilling also matters. Existing services, structural requirements & the final cable path should always be considered before the bit touches timber.

Plumbing Installation

Pipework often turns a simple-looking hole into a clearance decision.

A plumber may need to bore through suitable timber to route a service while leaving appropriate room for the installation. Having 12–32mm options together makes it easier to select around the required penetration instead of improvising with the nearest available size.

Carpentry & Building Work

Not every large timber hole carries cable or pipe.

Spade bits can also support suitable carpentry, construction, fit-out & general timber-boring tasks where the required diameter exceeds the practical role of a small twist drill.

For builders balancing drilling with the fastening work that follows, Impact Drivers can complement compatible hex-shank accessories across the wider tool kit.

Maintenance & Fit-Out Jobs

Existing buildings rarely present perfectly open access.

Maintenance technicians may need to add a penetration during an alteration, equipment installation or repair. A compact set provides multiple diameters in one identifiable case rather than sending the user through several loose accessory boxes.

That portability becomes particularly useful when the workshop is parked outside.

What Does the Power Chip-Breaker Edge Do?

Watch what leaves the hole, not just what enters it.

Sutton identifies a power chip-breaker edge as a feature of its current SupaBore spade bits. During timber boring, material removed by the cutting edges needs somewhere to go while the bit continues advancing.

Chip behaviour becomes especially noticeable during deeper penetrations because the cutting area can disappear inside the timber.

Don't respond to a reluctant cut by simply leaning harder on the drill. Withdraw as appropriate for the application, allow material to clear & inspect the bit if drilling behaviour changes unexpectedly.

Why the Heavy-Duty Shank Matters?

Large-diameter boring asks more from the accessory than a small pilot hole.

As spade-bit diameter increases, more timber has to be removed during the cut. Sutton describes the SupaBore design as using a heavy-duty shank for greater power transfer, making that construction relevant to the higher loads encountered during larger timber holes.

Tool choice still matters. Use suitable equipment, keep control of the drill & avoid treating every diameter as though it creates the same reaction at the tool.

A 12mm penetration & a 32mm penetration may come from the same case, but they aren't the same drilling job.

12mm or 32mm? Start With What Must Pass Through the Hole

Oversizing a timber penetration simply because the larger bit is convenient isn't a useful selection method.

Before drilling, establish what the opening needs to accommodate. Then allow for any appropriate installation clearance required by the job.

Measure first. A clean 20mm hole isn't much help when the installation actually required 22mm.

Hex Shanks & Cordless Trade Tools

Modern jobsites revolve around equipment that can move quickly between tasks.

The SupaBore range uses a hex-shank format, helping create a positive connection with suitable compatible tooling. That becomes useful for trades already carrying cordless drilling & driving equipment between rooms, floors or separate sites.

Compatibility shouldn't be assumed from appearance alone. Confirm the accessory connection, tool capability & intended drilling application before starting.

If your setup is built around portable cordless equipment, Power Tools provides a broader pathway for building out the working kit.

One Case Beats Eight Loose Bits

The missing bit is usually the one the job needs.

Sutton's Stack-In format gives the eight-piece SupaBore set a defined home while connecting it with a broader modular accessory-storage concept. Sutton describes Stack-In as a customisable system incorporating Stack Packs, Stack Tacs & Stack Racks, with cross-system compatibility designed around leading modular tool-storage brands.

For a spade-bit set, the immediate advantage is straightforward: the sizes stay grouped instead of spreading across tool bags, drawers & vehicle compartments.

Trades carrying numerous small accessories can add Portable Organisers for other consumables & job-specific components.

That organisational discipline becomes especially useful when several workers share the same equipment. One empty position in the case can flag a missing bit before the next call-out.

Don't Use a Spade Bit for Every Hole in Timber

A spade bit is excellent at the job it was designed to perform. That doesn't make it the answer to every timber-drilling problem.

Large service penetrations are its natural territory. Smaller pilot holes, different finish requirements, deep boring tasks or specialised woodworking operations may call for another drill geometry.

Consider:

► Required diameter
► Hole depth
► Timber type
► Access around the hole
► Finish requirements
► Tool being used
► Whether the hole is through or blind
► What happens after drilling

A buyer comparing drill accessories should therefore start with the finished hole rather than the assumption that every wood bit works the same way.

Control Matters More as Diameter Increases

A bigger cutting diameter can produce a more noticeable reaction at the tool.

Keep a stable stance, maintain control of the drill & make sure the workpiece itself is properly supported where the job allows. Unexpected movement from either the timber or the power tool can turn an ordinary penetration into an avoidable problem.

Rushing the start can also put the hole somewhere it wasn't meant to be.

Mark the position clearly, check the path through the material & consider what may exist behind or beyond the drilling point before proceeding.

The broader lesson in The Jobsite Doesn't Forgive. We Do. applies particularly well here: preparation is much cheaper than discovering a problem after the hole has been made.

Get More Life From the Set You Already Own

A spade bit shouldn't go straight from hot work into a pile of damp site gear.

Remove timber debris after use, inspect the cutting area & keep the set protected between jobs. Sutton's manganese phosphate coating provides corrosion & wear resistance on applicable SupaBore bits, but sensible storage still matters.

Pay attention when one diameter starts behaving differently from the others. A heavily used 25mm bit, for example, can accumulate far more work than a 14mm bit that rarely leaves the case.

The A tool is not just a tool. It’s a promise. article offers a broader perspective on why dependable working equipment matters when the job relies on it.

For additional protection around frequently transported gear, Heavy-Duty Tool Bags can help organise the wider trade kit.