The ultimate piston press makes working on you brake calipers easy. Specifically designed for compressing hydraulic caliper pistons when servicing calipers aligning pads or replacing pads. The ultimate piston press is easy to use and a great addition to every tool box. - evenly compresses caliper pistons with no damage to the pistons - simple and easy to use - non-marring design will not harm pistons or calipers - durable red anodized finish - makes changing pads and bleeding brakes hassle free