Extend your reach with the Bit Driver Extension tool. Fits into the bit holder on any Leatherman knife or tool and accepts all Leatherman bits as well as all standard 1/4 hex bits. The Bit Driver Extender works with the following tools: Charge AL Charge ALX Charge Ti Charge TTi Charge XTi MUT MUT EOD Skeletool Skeletool CX Wave Surge Removable Bit Driver c33B c33Bx c55B c55Bx e306x e307x e33B e33Bx e55B e55Bx h502 h503 k502x k503x Original Surge Skeletool SX Crunch and Signal.