SPECIAL ORDER Quick view Rotary Corp Piston Ring Assembly Tool Fits Husqvarna 502-5070-01 Rotary Corp brand aftermarket product. Piston Ring Assembly Tool Fits Husqvarna 502-5070-01. Useful for assembling pistons and cylinders on chainsaws. 4 sizes of clamps. Give yourself a third hand with this kit. This kit will compress piston rings... $16.89 Add to Cart