Package contents: 4 axle/axle adjustment rings. Dimensions: 20 x 32 x 14 mm (inside x outside x width). Adjustment rings are suitable for attaching unicycle tires to axle tubes or axles. The wavy ring is attached with set screws. PREMIUM MATERIAL: The adjustment ring is made of high-quality steel. Galvanized surface. The corrugated ring is protected against rust and corrosion, making it suitable for outdoor use. Unique design: Set screw type corrugated ring improves retention when the material is softer than the set screw material, supports low axial loads, and is easy to position. The collar has a socket head cap screw that secures the collar to the shaft. The nut is made of steel, strong and well designed for easy installation. Wide range of applications: The adjustment ring is versatile and can also be used in industrial settings due to its quality. Suitable for assembly of carts, karts, trolleys, or similar equipment. Adjustment ring. Set of 4 cylinder adjustment rings, 20 mm, for trolleys, corrugated connections. Features: Type: adjustment ring Color: steel Material: steel Finish: galvanized Dimensions: 20 x 32 x 14 mm (inner x outer x width) Adjustable ring screw stop ring. High-quality materials. The thrust ring is made of high-quality carbon steel. The drill is not damaged during use, durable and reusable. 20mm adjustment ring - Steel shank/shaft. Improved design. Grub screws are recessed to prevent injury during operation. Adjustment rings should not be installed on shaft bends, as this will cause deformation. Shaft diameter: 20 mm Quantity: 4 pieces Size: Internal diameter: 20 mm, External diameter: 32 mm Drilling depth limiter; the Allen key allows you to adjust and release the limiter. Stop ring, clamping device, drilling depth control device. Mainly used to fix the drill bit, limit hole depth, and ensure consistent hole depth. 20mm adjustment ring. Versatile: The adjustment ring is versatile and of high quality for industrial use. Suitable for carriers, karts, buses, trolleys, or other applications. Quantity delivered: 4 pieces Product color: silver Product size: 20 x 32 x 14 mm Note: Manual measurement, please allow 1–3 cm error.