Product 4.5" 110mm Sintered Diamond Blade Lapidary Rock Slab Trim Tools for Gemstone Code 110*20 Product Specification:Product Name: 4 in lapidary saw blades, lapidary trim saw, 110mm gem sawOuter Diameter: 110mm(4.5")Core thickness:1mm (0.039")Rim thickness: 1.1mm (0.043")Arbor hole: 20mm (3/4")With the bushing 20-16mm, 20-12.7mm, can be used on 16mm (5/8") or 12.7mm (1/2") arbor with a bushingRecommend RPM: 3800 RPMRim Type: Sintered diamond trim bladeMaterial: Steel, diamondQuantity: 1 pieceThis blade will perform well on any hardness rockDesigned for use on hard lapidary materials like agate, jasper, petrified wood, agates and geodesThe diamonds are sintered into the edge of the bladeMore diamonds in the sintered rim and a stiffer core make this blade cut faster and provide a long use-life, more durable than the Notched Rim Lapidary Diamond Saw BladeUsed for Trimming: They are excellent for trimming small shapes into stonesUse with light oil or water as a lubricantNew, Unused Blade - Not in Original PackagingThese blades were originally packaged in oil so you will see several oil spots on the surfaceDiamonds Series blades are a great low cost choice for your lapidary sawWe will send out your order within 1-2 days after payment has been received and cleared Product Name: 4 in lapidary saw blades, Sintered diamond trim blade, 110mm gem saw Outer Diameter: 110mm(4.5"); Core/Rim thickness: 1mm (0.039") /1.1mm (0.043") Designed for use on hard lapidary materials like agate, jasper, petrified wood, agates and geodes More diamonds in the sintered rim, stiffer core make this blade cut faster, provide a long use-life Arbor hole: 20mm (3/4"); can be used on 5/8"1/2" arbor with a bushing