The Family Handyman on MSN2 个月
Homeowner’s Guide To Allen Wrenches
An Allen wrench, AKA an Allen key or hex key, is a small hand tool used to fasten screws or bolts with a hexagonal socket.
How To Use An Allen Wrench The Right Way
You have your screwdriver with you, only to find a hexagonal socket waiting for you on the screw that needs tightening. Also ...