HSS Titanium-Coated Drill Bits This 30-piece drill bit set is made from classic high-speed steel (HSS) with a titanium coating for enhanced durability, wear resistance, and longer service life. Each cutting edge is hardened and precision-honed to deliver sharp, smooth, chatter-free drilling with clean, accurate holes. Efficient 2-Flute Design The 2-flute construction efficiently clears chips and debris away from the cutting edge, reducing friction and heat buildup. This results in faster drilling, improved accuracy, and cooler operation across a variety of materials. Quick-Change Hex Shank Each bit features a 1/4-inch hex shank that fits securely into power drills and impact drivers. Designed for quick-change chucks, the hex shank prevents slipping and allows fast bit changes. A quick-change adapter is included for added convenience. Versatile Performance Ideal for countersinking and drilling into: Metal Wood Plastic Well-suited for home DIY projects , general construction, maintenance, and light engineering applications. Organized Storage Case This set includes 29 drill bits plus 1 quick-change adapter , housed in a compact holder with clear size markings for easy organization and fast selection. Included Sizes: 5/64"", 3/32"", 7/64"", 1/8"", 9/64"", 5/32"", 11/64"", 3/16"", 13/64"", 7/32"", 15/64"", 1/4"", 17/64"", 9/32"", 19/64"", 5/16"", 21/64"", 11/32"", 23/64"", 3/8"", 25/64"", 13/32"", 27/64"", 7/16"", 29/64"", 15/32"", 31/64"", 1/2""