Free Express Shipping! Impact 20" Pivot Arm with Super Clamp Kit 1 x Pivot Arm (20"), 1 x Super Clamp with Wedge and Stud, Articulated Arm with 360° Rotation, 2 x 5/8" Pins, Clamp Has Ratcheting Handle, 5/8" Hex Stud has 1/4"-20 Male Threads, Clamp...