Extension bars/Adaptor/Impact coupler is constructed from high-strength Chrome-Vanadium Steel and Impact universal joint is constructed from premium Chrome-Molybdenum Steel, with a protective black phosphate coating.
Set Includes: Extension bars-1/4" Dr.: 3", 6"; 3/8" Dr.: 3", 6", 10"; 1/2"Dr.: 3", 6", 10"; Adaptor-1/4"F*3/8"M, 3/8"F*1/4"M, 3/8"F*1/2"M, 1/2"F*3/8"M; Impact coupler-1/4"Hex*1/4"Dr., 1/4"Hex*3/8"Dr., 5/16"Hex*1/2"Dr.; Impact universal joint-1/4"Dr., 3/8"Dr., 1/2"Dr.
Spring loaded detent ball and the through-hole in the drive end ensure sockets or extension bars from dropping.
Laser-etched with high contrast and specific size marking for identification. It helps you select the size easier.
It comes with a sturdy and convenient storage case. Keep each piece in the proper position. Meets or exceeds ANSI performance standards.