Home / Spare Tooling / COLLET 4MM COLLET 4MM$549 4 mm collet ER-11 used to secure 5/32″ drill. For use with Ghost Gunner AR-15, AR-308, and M1911 milling programs. *Please allow up to 3 weeks for delivery. COLLET 4MM quantity Add to cart Categories: Spare Tooling, Tools And Jigs Product ID: 7108 Related products COLLET NUT ER-11-A $1650 1/8″ END MILL FOR AK47 $1899 GHOST GUNNER CUSTOM CARBIDE END MILL 1/4IN $3799 #22 JOBBER DRILL $800