This is a must-have for any rider who travels, bar none! Thanks to its ingenious design, the rider can lock the throttle simply by a quarter-turn of the lever. Made from aircraft-grade materials, durability is a cut above the rest. Thanks to the cleverly designed spring-loaded spline, adjustments can be made on the fly. Installation requires drilling (21/64") and tapping (3/8"-24 tap) the control housing. These tools are not included, but a Drill Bit and Tap Kit, is available separately.