Material: Case-hardened steel, case-hardened, blackened and ground Note: The clamping height can be increased by using height adjusting cylinders EH 23310. and disks EH 1107. and EH 1108. from the Halder Modular Jig and Fixture System. It can be reduced by employing clamping inserts, e.g. EH 22730. The down-thrust clamps provide the following advantages: rapid manual clamping, by means of clamping screw, adjustable clamping lever or double eccentric lever, easy and quick changing of the work piece by swinging the clamping head to the left or right; continuously variable setting by means of positioning ring 23310.0350, when using a positioning ring 23310.0350 a repeatable precise clamping is ensured; h2 will then be increased by 7 mm (s minus 7 mm), reduced space requirements due to compact design, easy adaptation even to large clamping heights by means of height adjusting cylinders. Down-thrust clamps can be secured in two different ways: in a T-slot, directly to the mounting plate, e.g. of a fixture, by means of a set screw. The cylinder has to rest on the entire surface. Exceeding of the clamping height is inhibited by the height limitation.