With a special guide at the top (attachment adapter) for grooves measuring 12 x 6.5 mm to 12 x 8 mm. Use with the adapter on the lower part and the inverted upper part for securely fixing guide rails from brands such as Festool, Protool, Metabo, Makita, Hitachi/Hikoki, Dewalt, Bosch, and Mafell, as well as for clamping in profiles and on work tables. Can be used with the adapter on the upper or lower part for overlapping clamping. Usable with or without the adapter - for clamping or spreading. Ergonomically shaped 2-component plastic handle with a pump lever behind the rail. Pack of 2 pieces.