Park Tool BKM-1.2 Hydraulic Brake Bleed Kit Mineral Oil. The BKM-1.2 Hydraulic Brake Bleed Kit will bleed most models of mineral oil-based hydraulic bicycle disc brakes including models made by Shimano Magura TRP Tektro Trick Stuff SRAM DB8 Campagnolo Promax and Clarks. 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.