New elliptical design increases strength up to 25% over standard design Torx products. Two-pieces Bit & Socket assembly combined with the highest quality materials and heat-treating methods create the maximum torque specifications available. Services late model GM's , some Fords , Chryslers and imports. Note : Torx ' Plus will not fit standard Torx' fasteners . Standard Torx' tools will strip if used in Torx' Plus applications . Size TP50 Drive 3/8''