Versatile knob clamps for reliable workpiece holding in metalworking and woodworking environments. Key features - Easy installation and adjustable mounting distance: recommended screw size for installation is 4 mm x 7 mm; clamp is secured with screws and the installation distance is adjustable. If mounted with a small gap, you can tighten or loosen the screw to set the grip. - Flexible and precise grip: the screw provides fine adjustment to accommodate slight gaps and ensure a secure hold. - Broad applicability: suitable for metalworking tasks such as drilling, welding, bending, and inspection; also useful in woodworking and general industry for gluing and drilling. - Indoor and outdoor performance: works well across varied temperature environments. Oil- and dirt-repellent handle enables easy, safe and comfortable handling. Use scenarios - Metal fabrication: clamp parts during drilling, welding and bending to keep them steady and aligned. - Woodworking and assembly: secure components during glue-ups and drilling to improve accuracy and safety. - Workshop or field setups: use for fixtures or jigs in varied environments; the oil- and dirt-repellent grip helps maintain control in oily or dirty conditions.