DYN2519 Dynamite Crankshaft Locking Tool, .12 to .21 Engines. Conventional piston locking tools can damage or break pistons if too much force is applied.
 Dynamite’s new Crankshaft Locking Tool allows you to avoid this hazard by locking the rod and piston in place from the back of the engine. The new tool is machined from Delrin and will not mar internal engine components.