![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_74f2c446-d8d3-428f-96d8-eef35188c111_1024x1024.png?v=1494547149)
6 Pack 3/8" Premium High Performance "TiN" Coated High Speed Steel Drill Bits
What is "TiN" Coating? Learn More!
6 Pack 3/8" "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.