Set contains 1/4" drive star sizes TT10 to TT30; 3/8" drive sizes TT40 to TT55 and 1/2" drive size TT60. Set Contains 12 Pieces 12 Pc. 1/4"-3/8"-1/2" Tamper-Proof Star Driver Set Molded Storage Case Weight: 1.77 lbs. 6 Pieces 1/4" Drive Star SizesTT10, TT15, TT20, TT25, TT27, TT30 5 Pieces 3/8" Drive Star SizesTT40, TT45, TT47, TT50, TT55 3/8" Drive Star SizesTT60 2 Pieces Replacement PartsCA1235TT, SL01D