Fit-Lock Systems fastainer and grip-tainer products LockBolts consist of two parts: a pin, and a collar. The bolt is inserted into one side of the joint material and the collar is placed over the bolt from the other side of the joint material. Access to both sides of the joint is required. An installation tool is used to swage the collar materials into the grooves of the bolt providing a permanent and vibration resistant fastening. They are used for locking various plate materials.