●Used for inspection of R (radius) of workpieces, molded products, molding die, blade and the like.●Outer diameter round, for groove roundness.●Dimension (mm):70 x 15●Set Details (mm):2 sheets each: 1.0 to 3.0(per 0.25) 3.0 to 7.0(per 0.5)●Number of Sheets (sheets):34●Uneven (Male/female) independent type●Cold rolled steel