PEX Pocket Crimper - Combination 3/4, 1/2, 3/8 For Permanent Crimp Connections to PEX Tubing Fittings 3/8", 1/2" & 3/4" Sizes all in one tool! Simple to use, NO Adjustments!, Inexpensive too! Uses the less expensive, more heavy duty standard Crimp Rings preferred by Professionals Fits in tight locations - and in your tool box or pouch pocket