5/16'-5/8' Crimping Tool: Made of premium iron material with special treatment for high hardness and strength, making the crimping effect better. The crimper is very durable. And it equipped with 4 dies, size: #6 (5/16'), #8 (13/32'), #10 (1/2'), #12 (5/8'). Hassle-free Operation: The toolset is a comprehensive manual crimping tool. Though it has a light structure, it can give a large output force. The tightening screw can be easily screwed down with a wrench. Instant Setup: Our manual crimper can be installed according to the following steps: First, select a appropriate die to insert, then tighten the screw to crimp. Finally, you can get the hose crimped. Lightweight & Compact: One-person operation saves your time and energy. Besides, the crimping tool kit is stored in a plastic toolbox, reducing the possibility of missing parts. It is compact and easy to carry