Alltrade 648819 Mazda Crank Pulley Tool for Crankshaft Pulley Bolt Made to be the most reliable tools in the market today Tool solutions for most all situations Built to exceed tool standards For holding crankshaft stationary so that crankshaft center bolt can be removed or tightened Fits 1986-91 Mazda 323 and 1990-91 Mazda Miata with 1600cc engine Bolts directly to the crankshaft-using pulley attaching bolts 1/2" square drive Package includes usage instructions and photos