There are six different thread length for these M8 clamping levers from which you can choose the proper one to meet your need. Clamping lever is made from alloy and surface is finished by power coating or blackening for durability and rust protection. The inside return spring automatically engages the teeth, the handle can then be fixed in original position. By pressing down on the handle button the serrations are disengaged and the handle can then be turned to the desired position. Wide Applications: Clamping lever handles are widely used in Packaging machinery equipment, universal knife grinding machine, machine tool, welding equipment, printing equipment, woodworking machinery, packaging machinery, dyeing equipment, etc. A necessary parts of the machine. Tighten the clamping knob securely, and excessive clamping force can damage or strip the threads.