Time-serts are a solid bushing insert. This guarantees easy installation and allows for full load use of tapped hole, ensuring protection against stress and vibration. Time-serts are self locking. On installation the bottom internal threads of the insert are cold rolled to expand the mating external threads into the base material locking the insert in place. Thread Repair Kits include thread insert tap tool and thread inserting tool. Inserts sold in pk/10