Standard Thread Sizes and Specifications: These levers feature an M12 thread with a 1.75mm pitch, a 40mm (1.57inch) bolt length, and a 63mm (2.48inch) lever length. The hex socket measures 6mm (0.24inch), all finished in a sleek silver tone for a professional look. Durable Construction and Rust Protection: These clamping handle knobs feature plated steel components for enhanced durability and stability. The external threaded studs are treated with black oxide to prevent rust, ensuring longevity and reliable performance in a variety of environments. High Precision and Sturdy Construction: These handles are equipped with reinforced bolts and locking levers for high precision and are not prone to slipping. The zinc alloy handle ensures a sturdy structure and long life, making it ideal for rigorous use. Easy Adjustment and 360-Degree Rotation: The innovative push-button ratchet releases the gear teeth by simply lifting the handle, allowing for quick adjustment. The handle can rotate 360 degrees freely for smooth operation and easy positioning. Versatile Applications in Confined Spaces: Ideal for applications that require frequent and quick adjustments, these levers are perfect for use in confined areas. They are suitable for use on lathes, woodworking machinery, packaging machinery, printing and a wide range of industrial equipment. Colour:As Shown Material:Iron chrome plating Package Contents: 2 * ball positioning handle