Specification Brand : GEARWRENCH BulletPoint : Made in US BulletPoint1 : Hone engine cylinders 3-1/4 to 4-1/8" (83 to 105mm) in diameter to produce a plateaued finish for fast ring seating and better oil retention for longer engine life BulletPoint2 : Hone life is in excess of 1000 cylinders BulletPoint3 : Requires no setup BulletPoint4 : Use variable-speed 3/8" Electric hand drill and move the Flex-Hone up and down in the cylinder until desired results are obtained BulletPoint5 : The hone size listed on the product is the bore it is intended to be used for (or slightly smaller bore will work) Color : Black CompatibleMaterial : Carbon Steel ExternallyAssignedProductIdentifier1 : 082171024887 ExternallyAssignedProductIdentifier2 : 0082171024887 ExternallyAssignedProductIdentifier3 : 00082171024887 IncludedComponents : (1) "4-1/8" Engine Cylinder Flex-Hone" ItemName : GEARWRENCH 4-1/8" Engine Cylinder Flex-Hone - 2488D , Black ItemPackageDimensions_Height : 35.6 centimeters ItemPackageDimensions_Length : 12.7 centimeters ItemPackageDimensions_Width : 12.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flex-hones Manufacturer : Apex Tool Group Material : Silicon Carbide ModelName : 2488D ModelNumber : 2488D NumberOfItems : 1 PackageLevel : unit PartNumber : 2488D ProductDescription : 1 7/8 Flex-Hone silicon carbide 180 grit (48mm) ProductSiteLaunchDate : 2010-07-08T20:17:59.495Z Size : One Size SubjectKeyword : 180 grit SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1