Features Great For DIY, Home And General Building/Engineering Using. High speed steel construction with a ti coating provides ultimate durability and longer drill bit service life through multiple uses without deformation The cutting edge is hardened and honed for sharpness and features a chatter‑free design with staggered cutting teeth to ensure accuracy countersinking and flat holes. 50 pieces drill bit complete set of the most popular drill bits. Accuracy split point and twist design with gold oxide finish and round straight shanks increases the cutting speed. Great for most drilling jobs and materials such as aluminum, iron, wood, plastics, DIY, home and general building and engineering using. Containing different sizes for you to choose Description: 100% brand new and high quality Hss Drill Bit Set For Wood, Plastic And Aluminum Ideal For DIY, Home And General Building/Engineering Using Containing sizes: 1mm, 1.5mm, 2mm, 2.5mm, 3mm Material: High Speed Steel with Titanium coated Containing Sizes: 10 * 1mm 10 * 1.5mm 10 * 2mm 10 * 2.5mm 10 * 3mm Package Includes: 50pcs x Drill Bits Package List