These Bessey STC Self-Adjusting Vertical Clamps have automatic distance adjustment, whilst maintaining a constant clamping force. They ensure quick and secure clamping and are ideal for small-scale productions. Using the set screw on the cantilevered joint, the clamping force can be adjusted to meet particular requirements. The base plate, which is suitable for both metric and imperial, has been designed to facilitate fast and secure clamping set up. The plastic injection moulded and ergonomically designed handles fit well in the hand for a very good grip.Clamping Height: Up to 35mm.Automatic Adjustment: 20mm.Clamping Force: Up to 1,100N.Weight: 0.22kg.