About This CAPABILITY & DURABILITY: Classic HSS construction with black oxide coating for capability and durability, also ensures a longer service life so that the drill bits last through multiple uses. 135° SPLIT POINT TIP & TWIST DESIGN: Increases cutting speed with self-centering and prevents walking, clears chips and particles faster MULTI-FUNCTIONAL: Great drill bits set for metal/wood/plastic countersink. Suitable for Home DIY, and General Building/Engineering Use. EASY USE & STORAGE: The drill bits set fits the majority of drill/ driver currently on the market. Set Includes: Retailed packaged 10 Pieces Twist Drill Bit Set, most popular range of drill bits , include 1/16"(1.59mm),5/64"(1.98mm),3/32"(2.38mm),7/64"(2.78mm),1/8"(3.18mm),9/64"(3.57mm),5/32"(3.97mm),11/64"(4.37mm),3/16"(4.76mm),1/4"(6.35mm) Overview Material : High Speed Steel (HSS) Finish Type : Black Oxide Shank Type : Straight Cutting Angle String : 135 Degrees Brand : COMOWARE