PROFESSIONAL: This handheld crimping tool features a remarkably efficient ratcheting mechanism and a top-tier crimping die, ensuring consistently reliable crimps. It's specially crafted for handling insulated nylon electrical terminals. VERSATILE: This kit meets ASTM F2098 standards and is compatible with stainless steel clamps from any manufacturer, accommodating PEX connections ranging from 3/8' to 1'. It's also capable of cinching single-ear hose clamps within its operational range. COMPRESSIVE SET: The PEX Crimping Tool comes pre-adjusted, sparing you the need for additional calibrations. The kit includes a bonus calibration tool and features an enhanced storage bag for tidily organizing clamps and tools. MULTI-FUNCTIONAL KIT: This comprehensive package includes a PEX clamp cinch tool, a PEX cutter, 20 1/2-inch clamps, 10 3/4-inch clamps, a calibration tool and an upgraded storage bag for convenient storage and transportation.