• HSS Titanium Coating - Classic HSS construction with titanium coating for capability and durability. The cutting edge is hardened and honed for sharpness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean.
• Flutes Form - 2 flutes form helps clear chips and debris away from the bit, decreasing friction and heat for a faster, cooler drilling process.
• Quick Change - 1/4 inch hex shank fits into all power tools more easily and securely, specially for locking into quick change chuck. We also offer a quick-change adapter to better quick change.
• Meet Your Demands - Great drill bits set for metal/wood/plastic countersink. Suitable for Home DIY, and General Building/Engineering Use.
• Organized Holder - This 30-piece set includes 29 drill bits and 1 quick-change adapter. A drill bits holder with size index is included in the set for easy storage and organizing. Sizes include 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".