WHITES FORK SEAL HEAD TOOL (For BPF)Fork seal head tool for Big Piston forks The Whites BPF Fork Seal Head Tool holds fork cartridges for dissassembly, assembly and removal of the cartridge seal head from the tube. The tool enables you to change the fork springs without valve disassembly on 41mm and 43mm big piston forks, decreasing the time it takes and simplifying servicing big piston forks. Holds fork cartridges for disassembly, assembly and removal of cartridge seal head from the