HSS M35 COBALT-This step drill bit is made of HSS M35 cobalt with HSS titanium coating to improve hardness and heat-resistance lengthening the service life. Excellent for drilling or expanding the holes in the stainless steel, aluminum alloy, plastic, wood and copper.
DRILL FLAT WITHOUT BURRS-The spiral grooved drill cut more smoothly than straight grooved ones and other ordinary drill bits. The addition of cobalt increases the sharpness and wear-resistance and helps you drill holes flatly and smoothly without burrs in stainless steel cable railing posts and handrails. Perfect for home DIY, building use and industrial applications
9 STEP SIZES- These step drill bit include 9 steps: 5/32"(4mm), 13/64"(5mm), 15/64"(6mm), 9/32"(7mm), 5/16"(8mm), 23/64"(9mm), 25/64"(10mm), 7/16"(11mm), 15/32"(12mm). Capable to drill holes of 9 sizes at one time to save your time, efforts and money to switch between drill bits.
UNIVERSAL COMPATIBILITY-The tri-flatted shank fits with various drilling tools with 1/4 inch chuck size. It also helps to better clamp on the pistol drill to prevent slippage and shedding during the rotation.
MULTIPURPOSE-The special design of drill bit prevents metal scurf from flying around for improved safety. Perfect for drilling holes on various materials.