AES Industries Die Grinder Collet (Holds 1/8" Arbors / Shanks) Precision machined collet for using bits with 1/8" arbors and shanks Change from standard 1/4" holding collet to this and securely mount 1/8" bits without the need of a reducer This collet has 4 jaws that provide better contact and a stronger grip with your bit Hardened and treated high-carbon steel