Feature 1High quality bearing steel, durable with high hardness. 2Hard bearing steel with strong bearing capacity, not easy to deform. 3Ensure that the clutch can be smoothly engaged, soft to disengage, reduce wear, and extend the life of the clutch and the entire driveline. 4Enough room for grease to store with a longer relubrication interval. 5Mainly used for textile machinery, printing machinery, automotive industry, household appliances and more.Specification One-way bearings are bearings that can rotate freely in one direction and lock in the other direction. The metal housing of a one-way bearing contains many rollers, balls. Its rolling seat is so shaped that it can only roll in one direction and there is a lot of resistance in the other direction. Features: High quality bearing steel, durable with high hardness. Hard bearing steel with strong bearing capacity, not easy to deform. Ensure that the clutch can be smoothly engaged, soft to disengage, reduce wear, and extend the life of the clutch and the entire driveline. Enough room for grease to store with a longer relubrication interval. Mainly used for textile machinery, printing machinery, automotive industry, household appliances and more. Specifications: Model: CSK25PP Material: bearing steel Bore diameter: 25mm / 0.98in Outer diameter: 52mm / 2.05in Thickness: 15mm / 0.59in Weight: Approx. 140g Package included: 1 x One Way Clutch Bearing Note: Please allow 1-3mm error due to the manual measurement. Thanks for your understanding.