STANLEY® 85-388 1/4"" DRIVE 21 PIECE FRACTIONAL SOCKET SET 6 POINT STANLEY® DRIVE TOOLS ARE FORGED FROM HIGH-QUALITY STEEL AND FINISHED IN HIGH-POLISH NICKEL CHROME OR BLACK CHROME. SELECTED RATCHET HANDLES ARE ERGONOMICALLY DESIGNED AND HAVE AN EASY-TO-USE THUMB-OPERATED REVERSE-SWITCH MECHANISM. SOCKETS AND EXTENSION BARS REMAIN LOCKED ONTO THE DRIVE UNTIL DISENGAGED WITH AN EASY-TO-REACH LOW-PROFILE QUICK-RELEASE BUTTON. SOCKETS FEATURE OUR MAX-DRIVE™ DESIGN A UNIQUE RADIUS CORNER DESIGN THAT PROVIDES 15 MORETORQUE TO TIGHTEN FASTENERS EASILY AND SIMPLIFY THE TURNING OF ROUNDED CORNERS. MAX-DRIVE™ HELPS REDUCE FASTENER WEAR BY MINIMIZING CONTACT ON THE OUTER 5 OF THE FASTENER HELPING TO INCREASE LIFE EXPECTANCY. MAX-DRIVE™ HELPS REDUCE SLIPPING ON FROZEN OR RUSTED FASTENERS. ALL STANLEY® RATCHETS SOCKETS AND WRENCHES ARE MANUFACTURED GLOBALLY TO STANLEY SPECIFICATIONS MEETING AND OFTEN EXCEEDING ANSI SPECIFICATIONS. INCLUDES 6 POINT STANDARD 3/16 7/32 1/4 9/32 5/16 11/32 3/8 7/16 1/2 INCH. 6 POINT DEEP 1/4 9/32 5/16 11/32 3/8 7/16 1/2 INCH. ACCESSORIES 3 6"" DRIVE EXTENSION BARS PEAR HEAD RATCHET SPINNER HANDLE UNIVERSAL JOINT. BLOW-MOLDED CASE.