Bosch X-LOCK Premium Sandwich Tuckpointing Blades are made of a double-blade sandwich design, for one-pass mortar removal, instead of having to cut back and forth. The long-lasting blades feature the X-LOCK innovation 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. The one-pass sandwich tuckpointing blade design and X-LOCK wheel mount saves time. The double-blade sandwich stack optimizes performance over single blades stacked with washer and are made exclusively for dry tuckpointing applications. The industrial-quality diamonds produce a cutting surface optimized for thorough removal and extended life.