3-7/8" Flank Drive Shallow Impact Socket

 Snap-on® impact sockets are heat treated to optimize impact service life with a lower hardness than hand sockets and are able to withstand repeated cycling loads of impact wrenches. Chrome sockets are heat treated to optimize non-impact torque application (too brittle for impact use and are not the safe choice). FLANK DRIVE® wrenching system delivers up to 20% more turning power without slipping or rounding while exceeding ANSI® performance standards.