Clamps with manual quick-change jaw plates, without the need for any tools (Comb system). Amplified and improved downward effect during clamping (the comb system pulls the workpiece against the ram, ensuring greater repositioning accuracy). Complete with: lateral stop; pair of positioning dowels (standard for 16 mm slot, other dimensions quoted on request); offset socket wrench; T-spanner. Ground and calibrated holes with F7 tolerance already included in the price.