Easily adapt your Akiles Diamond 1 Corner Rounder with additional sizes of cutting units (also called dies) for a variety of applications. Binding 101 stocks a wide range of these hardened blades in standard sizes. The Diamond One Cutting Unit sizes include: 1/8", 1/4", 3/8", Straight Cut, and a Half Moon Die. We also offer the Depth guide for the Half Moon Die (required for use with half moon die). Made of stainless steel.