Specification Brand : Pufguy BulletPoint1 : Material:The 0.78" bore diameter Shaft Collar is made of solid aluminum, which is well made and strong. BulletPoint2 : Size:0.78" Bore Diameter, 1.57" Outside Diameter, 0.47" Height BulletPoint3 : Package Included: 4 pcs 0.78" shaft collars with screws BulletPoint4 : Easy to use: The clamping ring is designed for easy removal and adjustment to achieve better clamping and removal that fits your needs. BulletPoint5 : Please check the dimension carefully before you placing an order. Color : Silver Tone ExternallyAssignedProductIdentifier1 : 044861620267 ExternallyAssignedProductIdentifier2 : 0044861620267 ExternallyAssignedProductIdentifier3 : 00044861620267 ItemName : Pufguy 4 Pcs 0.78" Bore Diamter Single Split Clamp-On Shaft Collars Split Shaft Collars Aluminum Clamping Collar,1.57" Outer Diameter ItemPackageDimensions_Height : 1.5 centimeters ItemPackageDimensions_Length : 11 centimeters ItemPackageDimensions_Width : 9 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : clamp-on-shaft-collars Manufacturer : Pufguy Material : Aluminum ModelNumber : M2C-26 NumberOfItems : 4 PartNumber : BD1670 ProductDescription : Material The 0.78" bore diameter Shaft Collar is made of solid aluminum, which is well made and strong.