Ease of Use：Bolt handle with locking and quick release lever, adjustable clamping force, firm grip, not easy to slip. Can be rotated freely 360 degrees. Simply lift the push button ratchet lever to release and rotate freely for quick adjustments, easy to remove or install. Wide Applications：Adjustable handles provide a secure grip and quick adjustments for applications requiring frequent and quick adjustments or working in tight areas, such as lathes, drill presses, sawing machines, milling machine fixtures, machinery and equipment. Useful Tips：Make sure to use the correct size. Always tighten the clamping handle securely to prevent any movement. Do not over-tighten the handle as this can damage or strip the threads in the mating component. Replace the handle when necessary. Aluminum Alloy Carbon Steel：Lightweight aluminum alloy handles offer excellent strength, corrosion resistance, and long service life. The lever surface is sprayed, smooth and flat to prevent rust and corrosion. Threaded stud is black-oxidized to prevent rust. The tightly-in carbon steel insert handle is more stable and rigid. 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.