FREE SHIPPING 350MM (13.780") DIAMETER 2.5MM (0.098") THICKNESS 40MM (1.575") ARBOR HOLE BOLT HOLES: 4/12/64 + 2/9/55 (4/12/64 = 4 bolt holes which are 12mm in diameter on a 64mm bolt circle) The bolt circle is the distance from the center of one pinhole to the center of the other pinhole directly across the arbor hole.Please verify you order the correct arbor size. HSS M2 DMo5 TITANIUM NITRIDE (TIN) COATED Titanium nitride is an extremely hard ceramic material, often used as a coating on titanium alloys, steel, carbide, and aluminum components to improve the substrate's surface properties. The coating's main advantages include a longer life between sharpenings and added lubricity on the sides of the saw plate to reduce the stress associated with cutting hard materials. All blades are ground in the US on advanced computer numerically controlled (CNC) grinding equipment by industry experts with over 40 years of industry experience.