Gyro SledgeEver wished your gyro ball exerciser had more resistance? Well, this Gyro Sledge will give your forearms a burn in no time, with lots of loading room for progression! This fantastic tool is comprised of 2 major components: the bearing housing, which has a pair of 1 inch industrial bearings, welded together with two 5" loadable sleeves; and the handle, which is 20" in length by default and attaches to the head with a 1" coarse threaded bolt and nut