Thunderbolt titanium coated drill bits are designed for extreme durability and long life

The Thunderbolt web features a thicker core than a standard drill bit, which provides strength and protects against side-load breakage

A specially designed parabollic flute form clears chips and debris fast to keep the bit cool

A precision start, 135 Split Point tip starts on contact to keep the bit from walking for fast accurate holes

Excellent for drilling on curved surfaces, requires less effort to drill and is highly for use with portable drills

Includes: (2) 1/16", (2) 5/64", (2) 3/32", (2) 7/64", (2) 1/8", (1) 9/64", (1) 5/32", (1) 11/64", (1) 3/16", (1) 13/64", (1) 7/32", (1) 1/4", (1) 5/16", (1) 1/4" hex shank, (1) 3/8", (1) 1/2"