Die Set For Heat Shrink Connectors 4-6mm Yellow & 0.32-0.75mm Green 4300-3162 Top Quality: 50,000 cycle tested frame for longest life and consistent performance Reliable: Parallel, full cycle, ratchet controlled action ensures consistent accurate crimps Easy to Use: Designed to give user full visibility of the crimping process Versatile: Quickly and easily inter-change crimp dies on the job No More Lost Die Parts! Practical design uses guide pin to keep die components together Practical: Pocket size dies are compact and easy to carry Ergonomic: Reduced effort, ratchet assisted crimping! Use one hand or two with extended grip. Economical: One tool frame to do the job of many. Select only the dies you need