Steelman Pro 79989 1/2-Inch Drive, 3/8-Inch Pinless Swivel Impact Extension 3-Piece Set; 6-Inch, 9-Inch, 12-Inch EXTEND YOUR REACH - Extending the length of the drive shaft allows access to tight spaces 3 PIECE SET - This 3 piece set includes a 6-inch, 9-inch, and 12-inch extension PREMIUM QUALITY - Made from premium quality, heat-treated 4140 chromoly steel with black oxide finish 1/2-INCH FEMALE DRIVE END - 1/2-inch female drive end accepts the most popular size of power tool used for driving 3/8-INCH MALE END - 3/8-inch male end accepts all types of 3/8-inch impact grade sockets MAXIMUM TORQUE TRANSFER - Pinless joint design transfers maximum torque from driver to socket WIDE RANGE OF MOTION - With a wide range of motion more angles are available to work from making it easier to reach fasteners INCREASED SAFETY - Pinless design prevents projectiles common to pinned designs in the event of breakage