This simple little block will hold most padlock cylinders for locksport training. A rubber band around the pin stacks helps a lot when using this trainer.

UPDATE 1/14/24: The new design LockBlockV2) replaces the rubber band with a set screw in the side of the holder while expanding the tolerances for less hassle while removing and replacing cores. Threads are not included in the design, but you shouldn't have a problem tapping them in. I used a 10mm M4 Coarse pitch set screw.

Cylinders pictured:

• Masterlock LOTO W7000 Cylinder
• American 1000 Series Cylinder