This adjustable threaded collet stop set is made of steel material, which is very strong and can be used for a long time. This use is a small accessory that is widely used in milling machines and machine tools. Made with superb craftsmanship. The thread is very clear and convenient for us to use. Features - Color: Black. - Material: Steel. - Size: About 10.00X3.00X3.00cm/3.93X1.18X1.18inch. - The threaded chuck made of carefully selected steel materials has a . - Excellent workmanship makes this chuck smooth and free of burrs and can be used safely by us. - The clever design makes it easy to install, and . - Easily and accurately place parts of standard collet with an inner diameter and external thread. - Ingenious design and materials ensure its popularity in milling machine accessories. Package list: 1 x Threaded Collet Stop Set