The Variable Controller is a masterpiece of design. Packing an amazing amount of function into its diminutive form, the Variable Controller is a superb solution to the problems of stopping a falling climber. It also offers supreme control when rapelling. The Variable Controller is forged from HE30 aluminium with enough material to dissipate heat, yet remain light in weight. This choice of materials and method of construction, together with the smooth radii of the rope grooves, ensure long term durability and minimum wear to your ropes. The result is a uniquely versatile wedge shape that puts you in control.