About the Milwaukee 48-66-3160 model Chuck Key
The Milwaukee 48-66-3160 model Chuck Key is a part of the Chuck Series. This key tightens the jaws of the 3/4" capacity chuck (48-66-2000, 48-66-2040, 48-66-2080, and 48-66-2085). It can be attached to your cordset with the 48-66-4020 Key Holder.