Double Split locking collar, easy to install. CARBON STEEL WITH Black Oxide Coating - High-quality carbon steel offers superior strength, resulting in better axial and radial support. And with Black Oxide Coating, they have increased durability, weldability, and corrosion resistance SUITABLE FOR INDUSTRIAL USE - Suitable for many applications in automotive, machinery repair, and even medical equipment repair. Common uses include wheel stopper/spacer, bearing faces, component locators, and more ✔This Clamp-On shaft collar is made of solid Carbon Steel with Black Oxide Coating. ✔The Double Split Clamp-On Shaft Collar as known as (Two-piece Shaft Collar) has the same feature as the Single Split Shaft Collar with additional flexibility and convenience. ✔The design of double split is for easy installation and disassembly, which reduces labor and downtime when adjustment, removal, or replacement is necessary. ✔This style of shaft collar uses the full seating torque of its set screws to apply an even distribution of forces around the shaft's circumference. These clamping forces provide the collar with a better and stronger holding power compare to the single split shaft collars. ✔Suitable for nearly all types of machinery and industry, such as drive shafts, agricultural implements, medical equipment, gearbox assemblies, motor bases, machine tools, and paper and steel mill equipment, the automotive industry, the manufacturing industry, the hobby craft industry.