FEATURES: made of molded plastic. INCLUDES: (4) three arm type knock-offs (4) two arm type knock-offs (4) hex shapped knock-offs REQUIRES: a touring car that uses standard 4MM axles TAMIYA, KYOSHO ect.. SPECS: the two and three arm type diameter is .8" the hex is .4" round all are .35" deep WLG 9-25-97 ir/le