Park Tool BKD-1.2 Hydraulic Brake Bleed Kit DOT Fluid. The BKD-1.2 Hydraulic Brake Bleed Kit will bleed most models of DOT fluid-based hydraulic disc brakes including models made by SRAM Formula Hayes and Hope. Bleeding of hydraulic brakes removes air bubbles and contaminants from the braking system for long-lasting components and peak performance. Every part is replaceable and available from Park Tool. Housed in a rugged storage case.