Fluid Lock Kit A tool kit for sealing metal brake pipes. This is a set of three fluid locks, suitable for clamping and sealing metal flared pipes on braking systems, cooling system bypass, fuel pipes, AC pipes, etc. Additional Information: Provides an effective seal to metal brake pipes when the braking system has been opened. Size range: 4.2mm - 10mm. Three anodised aluminium bodies with composite screw. Prevents brake fluid loss and contamination of the work area. Made in Sheffield.