Bosch's X-LOCK Diamond Blades feature the X-LOCK mount and offer a blade change that's up to five times faster than conventional interfaces. There's an audible snap when mounting an X-LOCK Wheel on an X-LOCK grinder. The wheel mounts properly without the need for a spanner wrench or flange nuts. The blade is released from the grinder with the pull of a lever. Designed for universal compatibility, this wheel fits both X-LOCK® grinders and standard 7/8 In. arbor grinders across brands. This segmented rim diamond blade is designed for fast universal rough cuts in pavers, soft brick and concrete/block. This blade provides an optimized mix of select quality diamonds, to deliver both fast cutting and longer life. Each blade features a steel core that produces straight smooth cuts with less wobble. This stability helps result in longer blade life.