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Silver twist drill bit with brad point and spur cutting edges, 4.20 mm diameter

M.A. Ford

M.A. Ford Twister Brad and Spur Drill 4.20 mm 20716540

SKU CH-KMZ9-RXBN3

A 4.20 mm Twister Brad and Spur Drill for precise woodworking and drilling tasks

  • Precise 4.20 mm drilling for clean holes
  • Brad and spur design reduces wandering on start
  • Twister flute clears chips efficiently during use
  • M.A. Ford quality built for professional reliability
  • New condition ensures full performance from first use

Twister Brad and Spur Drill 4.20 mm

The M.A. Ford Twister Brad and Spur Drill in 4.20 mm diameter is a precision accessory for power and pneumatic tools. It is designed for woodworkers and metalworkers who need clean, accurate holes in timber or composite materials. The brad point centres the cut while the spur scores the fibres for a splinter-free entry.

Installing the drill bit

The bit fits standard drill chucks and installs in seconds with a simple tightening action. No special adapters or calibration steps are required. The most common issue is running the tool at excessive speed, which can overheat the cutting edges and dull the brad point prematurely.

Who this suits and who it does not

This drill suits tradespeople and hobbyists who regularly bore 4.20 mm holes in wood-based projects and value a crisp finish. It is not intended for buyers who need larger diameters, masonry capability, or a multi-size set for varied tasks.

How it compares

Measured against everything we stock in Bits, Hole Saws & Accessory Kits, at today’s prices. Recalculated every night.

Price $39.99
Pricier than about 61% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameM.A. FORD

Questions about this item

How do I know the 4.20 mm Twister Brad and Spur Drill 20716540 is cutting correctly after I chuck it in my drill?

The drill should produce clean, centred holes in wood without wandering; the brad point centres the cut and the spurs score the fibres for a smooth entry and exit.

What comes in the package with the M.A. Ford 20716540 and do I need any extra accessories to use it?

The box contains the single 4.20 mm Twister Brad and Spur Drill; no additional accessories are required beyond a compatible drill chuck.

Which version of the M.A. Ford Twister Brad and Spur Drill should I choose for a 4.20 mm hole?

Select the 20716540 model, which is manufactured specifically in the 4.20 mm diameter for that hole size.

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