This tab can be used in many different applications. The hole diameter is 1/2 inch this allowing the tab to be used with shocks and poly bushings. By poly bushing we are referring to spring eye bushings used in leave spring applications. This is useful for mounting things like engines, transmissions, cross members, and more. The tab is CNC cut from high strength A36 steel plate. The tab measure 2.5 inch wide at the base. The hole measures 1.63 inch from the base to the center of the hole. The tabs are priced at per tab.