Make a straight cut along the edge of tooling leather using a swivel knife attached to this handy guide. Fast and easy way to carve perfect borders that must be "just right". Adjusts from 1/16" (0,2 cm) to 1 1/2" (1.3 cm) . For right or left-handed people. Fits 3/8" (1 cm) blade. Cutter not included.