WinHolder Impact 1/4 3/8" 1/2" IMPACT Hex Torx Spline Bit Sockets Star HX Allen. 9/10/11/15 PIECE 1/4" 3/8" 1/2"DRIVE IMPACT HEX - TORX - SPLINE BIT SOCKET SET. IMPACT TORX SPECIFICATIONS - TORX 9 SIZES ( T ).
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