Disston E0103181 4 x 1/2 x .025-Inch Blu-Mol Air Saw Blades, 18 Teeth Per Inch, 100 x 12.5 x 0.64mm, Sold In Tubes, 5 Units/Tube Specially designed blades for use in pneumatic saws Air saw blades have fine teeth for cutting metal 18 Teeth per Inch