Here's another Dayton option. These work very well if you want to insert the wire from the rear (keeps things very tidy). Two small screws hold the wire tightly inside the inner sleeve. No soldering necessary. Easily takes 12 gauge wire. http://www.partsexpress.com/pe/showdetl.cfm?&DID=7&User_ID=14880522&st=3778&st2=-61089937&st3=81477003