The wire grip is designed to firmly grip the wire without damaging the insulation and is user adjustable for maximum control. Designed for applications when it is impractical to push on the contacts as in the case of testing module blocks or when access to the front of the connector is restricted. The RTCRT-200e uses the same proven mechanism as our other retention testers for years of reliable service. Standard test force is 5 to 7 lb. Custom settings available.