This High Speed Steel Hole Saw is perfect for cutting through aluminum, steel, stainless Steel, copper and brass etc.... With saw diameter options of 16mm, 18.5mm, 20mm, 25mm and 30mm, you can tackle any job with ease. These saw blades are durable and long-lasting, ensuring a clean cut every time. Ideal for metalworking and CNC manufacturing, this set is a must-have for any professional or DIY enthusiast.