Freund Radius Roller 25 & 50 tools are for bending & edging curved sheet metal and can produce tight radii (both inner and outer) The handle has been constructed for an optimal power transmission and leverage. The tool features index markings in both cm and inch for easy set up and the bend depth is infinitely adjustable. Radius 25 bending height is 1/4" to 1". Radius 50 bending height is 1/4" to 2". Capacity: 22ga steel, 24oz copper, .032" Aluminum.