These Cobalt Jobber Drill Bits are made from high-speed steel, with a 118° angle tip, and a cobalt layer finish. These bits are in Fractional size. American Wire Size bits are listed separately. Click the Jobbers tab below to see more.
Spade bits are used for rough boring in wood. Spade bits are flat, with a centering point and two cutters. The cutters are often equipped with spurs in an attempt to ensure a cleaner hole. Intended for high speed use, they are used with electric hand drills. Spade bits are also sometimes referred to as “paddle bits”. Available in 1/4″ – 1-1/2″.
Countersinking screws is a often used method for ensuring a flush surface, without bumps of screwheads getting in the way. These cross-hole countersinks are specially designed so that the trailing edge of the hole makes the cut, and they excel at ejecting chips as they drill. Made of strong steel, they ensure years of precision work.
TruCut Masonry Bits High quality masonry drill bits with heavy duty carbide tips. These masonry bits will drill through any rock or concrete that needs a hole in it. The Premium quality bits have a hex-shaped shaft to eliminate spinning in the drill chuck. They also achieve a longer life at higher speeds due to “Super H” grade carbide tips.
Made from S2 modified shock resistant steel for professional performance and durability. Featuring a patented spiral torsion zone absorbs impact and extends bit life. Proprietary precision CNC machined tips for excellent fit in fastener recess. Tested to outperform all leading brands in lifecycle and tip failure testing.
One particular type of reduced-shank drill bits are Silver & Deming (S&D) bits, whose sets run from 33/64″ to 1″ drill body diameter with a standard 1/2″ reduced shank for all. This allows drill presses with 1/2″ chucks to run the larger drills. S&D bits are 6″ in length with a 3″ drilling depth.
Countersinking screws is a often used method for ensuring a flush surface, without bumps of screwheads getting in the way. These cross-hole countersinks are specially designed so that the trailing edge of the hole makes the cut, and they excel at ejecting chips as they drill. Made of strong steel, they ensure years of precision work. Available in a 9 piece or 4 piece set.
Made especially for drill presses and milling machines, these Silver & Deming drill bits are 6″ long with a 3″ drilling depth. They all have a 1/2″ shaft.
Made from S2 modified shock resistant steel for professional performance and durability. Featuring a patented spiral torsion zone absorbs impact and extends bit life. Proprietary precision CNC machined tips for excellent fit in fastener recess. Tested to outperform all leading brands in lifecycle and tip failure testing.
These Aircraft length drill bits are formed from high-speed steel, with a 135° split point tip, and black oxide finish. Select sizes are available in lengths up to 72″, for the extreme jobs.