M1-Ridgbor Extension Bits These bits will cut through Metal lath, Nails, Knots, and "Hard Woods" easily. Most bell are made of carbon tool steel, suitable for wood only. The Ridgbor is made of the same steel used in bits manufactured for production cutting of tough metals.

REDUCED SHAFT SERIES are an exclusive bit that has been a favorite amongst experienced journeyman for over 3 decades. They are made with a slightly deeper angle (118° standard point) and undergo a machining process which makes this bit unlike any other bit on the market. The unique difference between the reduced M-1 Ridgbor° and other HSS extension bits is the secondary machining process. The Reduced M-1 Ridgbors are machined down, all the way into the bottom of the flute allowing 100% chip clearance and smooth, non-binding penetration. Especially suitable for drilling through both metal and wood (including nail embedded wood). The Ridgbor does not have a wire pull hole.

Reduced Ridgbor Specifications:

• Reduced 1/4" Diameter: Shafts are machined down to 15/64"
• Reduced 3/8" Diameter: Shafts are machined down to 5/16"
• Reduced 1/2" Diameter: Shafts are machined down to 3/8"
• Reduced 3/4" Diameter: Shafts are reduced to 1/2" (not machined)

M1-RIDGBOR ***Rigid enough not to flex (excellent door core bit) ***tough enough to bore through door & window headers with ease ***Reduced just enough to penetrate and remove material without binding ***Hard enough to cut both metal and hard woods ***Accessible to anywhere, from anywhere, with a phone, fax, computer or smart phone ***Free shipping to anywhere in the continental USA with a minimum 100.00 order. ***Special lengths and diameters can be special ordered, ask your account manager for details.