Foundation Hydraulic Piston Press Pushing Apart When you need to replace your worn-out hydraulic brake pads, you'll need to push your pistons apart before you install your new pads. The Foundation Hydraulic Piston Press allows riders to open pistons by pushing them apart. It's made out of durable steel so you can keep using it over and over again. Features Compatible with all hydraulic disc brake systems Wedges into the caliper so you can push the pistons apart Durable steel construction with a rubber handle for comfortable use | Foundation | Hydraulic Piston Press Hydraulic Piston Press | Rubber