Crank Turning Sockets

call me extravagant or foolish but I bought a comp cam 4799 at summit for my LA sm. great tool. Made of steel. Rotate engine forward or back with out loosening crank bolt and mount degree wheel separately undisturbed. 1/2" drive. Set screw has a brass extension to not mark crank. 3 key ways. Also fits Olds (what ever!).