Titanium-nitride coating on step drills reduces friction and increases drill life by a factor of six uncoated step drills.
Titanium-Nitride-Coated Step Drills
All step drills have three flats ground on the shank, preventing the drill from slipping in the chuck. A balanced double flute provides two cutting edges for faster and easier cutting in most soft and hard materials. They are available with 1⁄4 and 3⁄8-in. shanks.
M. K. Morse Co.,
Box 8677, Canton, OH 44711,