Review on Enhanced Durability and Safety: Globe 877 Power Cord Strain Relief by Chris Dildine

Obviously these fittings require a special tool. If you don't have tools then: 1) Half of them will NEVER get in. 2) Prepare to spend more than 30 minutes on each device. 3) You CANNOT adjust the length of the cable in a practical way as it is designed to fall in half. 4) What works for inserting one cable will NOT work for installing the next. Each connector has its own unique personality. There is no other method than scratching the bracket and cable. 5) They will fight you so hard that you will lose money which could be a slam dunk offer.