Used to make up a tool to connect a hydraulic line from my hand pump to a brake caliper for servicing. Makes it easy to 'pump out' the caliper piston for disassembly and seal replacement. Much safer than using air and pushes out even stubborn pistons. Longer stem length of the adapter helps it clear any caliper body obstructions. The perfect size for the Nissan X-Trail brake caliper line connection as it is the same as the OEM hose fitting (10 mm Banjo).
DL the Engineer
Brampton, Ontario, Canada