![Drill Bit - 1/4"- 3 Flute - 3/4" LOC - 4" OAL - ZrN Coated 80% AR15-AR10 Lower Receiver Jig End Mill](http://www.americangunsmithtooling.com/cdn/shop/products/Drill_6_8fa1b584-d65d-4482-a4fd-7a45dfe2de2a_1024x1024.png?v=1494547150)
6 Pack 31/64" Premium High Performance"TiN" Coated High Speed Steel Drill Bits
What is "TiN" Coating? Learn More!
6 Pack 31/64" "TiN" Coated High Speed Steel Drill Bit, 135 Deg Split Point, HSS, The Best High Performance drill bit for AR15 / AR10 / .308 Lower Receiver Jigs. Drill bits were designed specifically for drilling aluminum.