Ecocstm Proportioning Valve Bleeder Tool, Brake Proportioning Valve Bleeder Tool, Brake Bleeder Proportioning Valve Tool, Compatible with DISC/Drum PV2 and PV4 172-1371 (Blue). Efficient Bleeding: The brake proportioning valve bleeder tool is designed for locking the low-pressure bleeder valve, which can effectively prevent fluid from entering the brake system, making it easier and faster to bleed the brake system.
