Product size: Needle Clamp Set Screw size is 19mm long, 12mm head width, 12mm thread length, 3.3mm thread diameter, Manual measurements, please allow slight errors. Compatibility: This product is Compatible with Juki Single Needle Industrial Sewing Machines, and is also suitable for most single needle industrial sewing machines. Product material: This product is specially designed and made of metal, with high service life and not easy to damage. Easy to install: It can be directly replaced without adjustment, with perfect compatibility and high reliability. Product list: Product include a total of 4pcs Needle Clamp Set Screw, 4pcs Thumb Foot Screw, which can completely meet your daily use needs and replacement., Manufacturer: YINETTECH