The ratchet system holds the blade in place while you adjust your grip to increase the pressure. The high carbon steel blade maintains sharpness and resists chipping. These cutters can be used for cutting PVC, CPVC, Polyethylene, PEX and ABS tubing. The cutters have a quick-blade reset and can be used as a one handed operation. With the handle locking strap for safe storage, the easy replacing blade feature and the ergonomically designed handle, these cutters are a perfect addition to any tool box.