The LoPro bolt features a 1/2″ allen drive, a smooth shank to minimize wheel wear, and an extraction slot at the end of the bolt for easy removal in case of a broken bolt. These bolts are designed to be used only for the new 500, 700, and 900 LoPro pockets due to the angled shoulder on the pocket. All LoPro bolts should be torqued to 180 Foot Pounds. There are five different bolt sizes for the LoPro bolts.