This ring shank bender by Durston is a complete unit to help make bending pieces quick and easy. The unit includes seven changeable dies--5 round, 1 square and 1 rhombus--and a lever type handle that will complete any job efficiently. The unit sits on a 200 millimeter diameter base, and the entire base holder can be mounted onto a bench or clamped into a vise. Check out this ring shank bender at Stuller.com/tools.