Harwin Hand Crimping Tool for M22 Crimp Contacts Hand crimp tool designed for use with M22 series crimp contacts consisting of a set of jaws that contain upper and lower crimp dies. The crimping dies contain 3 crimping indents for wire sizes ranges 24-30 AWG, 28-30 AWG and 24-28 AWG. This M22 hand crimp tool features a ratchet control mechanism which remains locked until the handles are fully closed ensuring a full crimp cycle is achieved.