More comprehensive applications: The cobalt drill bit set can be used effectively on most soft and hard materials, such as stainless steel, cast iron, high temperature alloy, titanium alloy, plastics and woods.
Deliver extended post-purchase support: Should our product not meet your expectations for any reason, you can opt for a full refund or a replacement at no cost.
High-quality materials: Twist jobber length drill bit made of 5% cobalt alloyed high speed steel. Bronze steam surface treatment provides a combination of hardness and toughness for wear resistance rigid, thick web design strengthens the core to increase drill bit durability.
More professional performance: Self-centring 135-degree split point tip helps to reduce thrust and aids an easier penetration; Tips are professionally hardened and polished for more accurate and fast drilling and faster removal of chips and particles.
Size & Packaging: Including 1/16", 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". Packed in a plastic box with size index for easier storage.