HAND CRANK add-on for the slip rollers that we sell.  
Raw steel finish, just like the rollers.

Note that these come in a pair and that both sides need to be installed at the same time.  this means you need a table or mount that is just as wide as the slip roller, to enable the idleing one to swing around.

Will be approximately 18" long and will ship in the same box as the slip roller.  Free shipping because you paid for shipping the primary roller