Sparrows Various Tools Practice Lock Holder Handle Progressive Locksports

Made these to stop my hand from cramping up, various sizes, I use the 4x 75mm version.

New versions to allow 2x and 4x locks.

Added Crenulated nut tool and follower tool.

Tolerances are very tight, so make sure your printer is calibrated, if it is too tight scale up 1% or 2%, if too loose scale down.

Hole in the back of the holder to push out the lock, I use a screw driver, allen key, pen or whatever is on hand.