Material: Screw insert and locking screw: Steel 5.8, black oxide finish. Handle: zinc diecast. Plastic coating: black. Disengaged by pulling. These adjustable clamping levers are the result of modern industrial design, and they are easy to operate, they also meet ergonomic demands. All such levers have proven to be ideal wherever parts have to be clamped in confined spaces or in a particular lever position. The insert is connected to the lever via serrations. Pulling the lever upwards disengages the serrations, allowing the lever to be turned to the ideal clamping position. When the lever is released, the serrations automatically re-engage.