Inserts are mounted in the tool holder using a torx screw or a 5mm hex screw. The screw size varies with the size of the insert and tool holder. Replacement and extra screws are available to avoid downtime, as are torx screw drivers as needed. Swivel ball-bearing point set screws are used only in lathes without Y axis during eccentric bushing rotation to correct symmetry errors. Do not over-tighten the ball-bearing point set screw – it must allow the tool holder to move up and down as the bushing is rotated. It is important to confirm the screw/bolt requirements for the existing tooling to be used in the mounting of the tooling system.