Single Rear base plate CNC 3D Printed cad design. Extra long adjustable holes pattern, STEP down bushing seat for extra tall bushing, or short bushing for extra washer adjustment. Anodized gunmetal gray, built inn tool on the bottom. Extra long bolt lock nut hole, so you can use inverted king pin, removable pivot cup hole. Us for DH, Slalom,LDP, Push ,Surf SK8, Street luge. Fit’s Randal 125,150,180 hangers. Dimensiono 4 1/8” X 2 5/8” weight 6.5 OZ