Knipex self adjusting crimping pliers for end sleeves ferrules knipex 97 53 04 these knipex self adjusting crimping pliers for end sleeves ferrules offer automatic self adjustment to the end sleeve ferrule used allowing the specialist to work with less strain and enabling secure reliable and quick crimping the extensive range of applications allows square crimping from 008 to 100mmsup2 knipex 97 53 04 self adjusting crimping pliers for end sleeves ferrules