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Drill Bit - 1/4"- 3 Flute - 3/4" LOC - 4" OAL - ZrN Coated 80% AR15-AR10 Lower Receiver Jig End Mill

5/16" Premium "TiN" Coated High Speed Steel Drill Bit

$ 8.99

 

 

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5/16"  "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.

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