Size: The ac hose crimper comes with a complete set of dies covering hose sizes: 6(5/16in), 8(13/32in), 10(1/2in), 12(5/8in) and reduced barrier hose sizes: 6(5/16in), 8(13/32in), 10(1/2in), 12(5/8in) . Always wear safety goggles when operating Instant Setup: Our hydraulic crimper can be installed according to the following steps: First, select the correct die to insert, insert the pin, then turn the tools body clockwise until dies are snug against hose fitting. Turn the valve to work position, pump the handle until stop. Finally, you can t the hose crimped Easy to Store: Hose Crimper Kit comes with a whole set of accessories and one stora box, which makes it easier for you using. Easy to store, easy to organize, avoid missing Wide Application: The crimping tool has a base that can be mounted to a bench for easy use, or the base can be held by any vise. It is compatible with the project cars AC lines, bead locking fitting, and A/C hose. Excellent Performace: The aluminum alloy pump is lighter in weight, and the hand?held detachable hydraulic design makes the manual air conditioning hose compressor easier to use, Manufacturer: OTENC