Features: Heat treated & tempered high-carbon steel with Titanium Nitrate coating for superior cutting power. Great drill accessory for any work shop backed by manufacturer's lifetime warranty. Enlarge or countersink holes, deburr edges; 15-degree chamfer. Use on steel, aluminum & other metals, plastic or wood. Specifications: Name:Tapered Drill and Countersink Bit Balance: +/- .003" tolerance Material: Black chamfer drill body material: steel #45 Color: Silver and Black Size: 8mm round shank 4mm(Dia) x 75mm(L) 5mm(Dia) x 85mm(L) Package includes: 2 x Woodworking chamfer 1 x L-wrench Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you.