This Mini Saw Blade Will Really Do The Job For You Every Time. Only 7/8" In Diameter, But It Has 108 Razor Sharp Teeth To Cut Right Through. Compatible With Any Rotary Tool, This Is A High-speed-steel (hss) Accessory.* High Speed Steel * 108 Cutting Teeth * 7/8" Diameter * Compatible With Rotary Tools * Needs 3/32" Shank