137mm x 20 x 50T TCT METAL CUT SAW BLADE Morse Metal Devil 137mm Titanium Carbide Tipped Metal Cutting Circular Sawblade for cutting thin steel 137mm (5-3/8") Diameter 20mm Bore Includes 16mm and 10mm Bushing Washers 50 Teeth Max RPM 4200 Made in USA - High Quality. High grade carbide - Long & consistent blade life = lower cost per cut. Optimized tooth tip design - Minimizes stress to give increased life. New plate technology - Greater stability for smoother cuts and longer life. Dry cut and virtually spark free. Cuts 150mm x 6mm steel in 12 seconds! - Fast cut.