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A silver metal insert bit, one inch long, with a tri-wing tip and quarter-inch shank

Tuff Stuff

Tuff Stuff TW4100 #4 Tri-Wing Insert Bit 1" pneumatic accessory

SKU CH-4XCW-6M1HM MPN TW4100

A 1-inch tri-wing insert bit with a 1/4-inch shank for use with drills and screwdrivers

  • Product typeDrill Bits
  • Sold asEach
  • Tri-wing #4 tip fits matching fasteners securely
  • 1" overall length reaches recessed screw heads
  • 1/4" hex shank fits standard drill chucks
  • Single-ended design keeps the bit compact
  • Durable construction withstands repeated tightening tasks

Tri-Wing #4 Insert Bit

The Tuff Stuff TW4100 is a single-ended Tri-Wing bit with a #4 tip, built for driving or removing matching fasteners found on consumer electronics and appliances. It suits technicians, hobbyists and maintenance staff who encounter these less common screw heads in repair work.

1/4-inch shank fits standard holders

The 1/4-inch hex shank seats directly into any drill chuck, impact driver or screwdriver that accepts industry-standard insert bits. No adapter is required. The one-inch overall length keeps the tip close to the workpiece but can limit reach inside deep recesses or tight corners.

Handles routine fastening tasks

The hardened steel tip resists rounding during normal hand-tool or cordless-driver torque levels. It is not designed for continuous high-torque impact use or for fasteners larger than the #4 profile, where a dedicated power bit or larger tip size would be needed.

How it compares

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

Price $1.08
Cheaper than about 99% of the 5,493 comparable items (median $27.99).

Specifications

Product
Brand nameTuff Stuff
Model nameTW4100
Product typeDrill Bits

Questions about this item

How can I confirm the TW4100 bit is working correctly after fitting it to my drill?

The 1/4" shank should seat firmly in the chuck without wobble, and the #4 Tri-Wing tip must engage the screw head cleanly so the fastener turns smoothly without stripping.

What comes in the package and what extra items are required?

One TW4100 insert bit is supplied; you will need a drill or screwdriver with a 1/4" chuck or bit holder to use it.

Which tip size should I select for my Tri-Wing screws?

Choose the #4 tip when your screws match a #4 Tri-Wing recess; other sizes are not covered by this model.

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