Pivoting Stainless Steel Drive-bar will work with the RPG cartridge grips, Hawk Grips and World Famous C-4 Disposable tubes. The pivoting DriveBar pivots on its end join self aligning to with the cartridge when the machine is active. This stabilzes the bar and needle without the need of bushings casuing additional friction and noise. Made of aircraft Aluminum Enclosure, Self Lubricating Slider, Ball Bearing Slide Stabilization, Adustable Stroke from 2.8-4.2mm (with variable options in between) without inter changeable parts, Varialbe Give On-the-fly (one full turn of the dial takes your from no give to full give) and Hex Drive Mechanism. The Edge uses the same HexDrive MotorBolt as the Direkt, this means that if you have the Direkt you can interchange MotorBolts. This machine is for the use of Cartridge System Only! Made in the USA!!