Atoplee 6pcs 1/8 inch Shank High Speed Steel Mini Circular Saw Blades with Mandrels for Rotary Tool Circular saw blades7/8" (22mm), 1" (25mm), 1-1/4" (32mm), 1-1/2" (35mm), 1-3/4" (45mm),2''( 50mm) Mandrel Arbor Size: 1/4",Mandrel Shank Size: 1/8", Lenght: 2" Maximum RPM: 20,000 This unique great tool set is ideal for precision cuts in wood, aluminum, brass, copper and more! Highly durable, sure to last for a long time! This unique great tool set is ideal for precision cuts in wood, aluminum, brass, copper and more! Highly durable, sure to last for a long time! High speed steel blade and mandrel set is ideal for fine precision cuts in aluminum, brass, copper, wood and plastic Mandrel Arbor Size: 1/4&#034;, Mandrel Shank Size: 1/8&#034;, Lenght: 2&#034; Maximum RPM: 20,000 1/8&#034; shank screw mandrel Contains 6pcs mini circular saw blades 7/8&#034; (22mm), 1&#034; (25mm), 1-1/4&#034; (32mm), 1-1/2&#034; (35mm), 1-3/4&#034; (45mm), 2&#039;&#039;(50mm), and 1pc mandrel 1-1/8&#034; (3.17mm) Diameter Shank