- Universal brake piston pressure rotary device for workshops, craftsmen and DIY enthusiasts. A quality tool designed to assist in disc brake service. - Function and benefit: Used during brake pad replacement to retract the brake piston on calipers, making pad changes easier and safer. - Key hardware: One pressure nut for the rotary spindle; pin diameter approx 6 mm; gaps between pins 16 mm and 28 mm. - Compatibility and versatility: The extra long rotary spindle features a 3/8 inch (10.0 mm) external square universal socket, so the spindle can be used with other matching adapters for many vehicle types. - Practical applications: 1) Replacing brake pads on disc brake systems in standard vehicles. 2) Retracting pistons on calipers during servicing. 3) Using with different adapters in a workshop to cover multiple vehicle makes.