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. This segmented rim diamond blade is designed for fast universal rough cuts in concrete, brick, and masonry. The 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.