This is all you need to do a complete service on your RCMAX engine. The slotted holes carefully line up to aid in the removal of the clutch, flywheel and clutch backplate. The other holes line up to press or split the engine case halves together without causing any damage or remove the crank. Built from a beautiful solid piece of 7075 aluminum in typical beautiful RCMAX fashion. If you own an RCMAX engine, this is a must for the toolbox, you can thank us later.