General description 13Pcs Metal Hole Saw Set includes a variety of sizes ranging from 16mm to 53mm, designed for use with electric drills and gadget machines. The set features sharp and anti-cut gears that ensure lower consumption and a long service life. Technical specifications Material: High speed steel Sizes: 16mm (0.63"), 18mm (0.71"), 20mm (0.79"), 22mm (0.87"), 25mm (0.98"), 26mm (1.02"), 28mm (1.10"), 30mm (1.18"), 35mm (1.38"), 40mm (1.57"), 45mm (1.77"), 50mm (1.97"), 53mm (2.09") Maximum perforation depth: 5mm Drilling depth in wood: about 20mm Drilling depth in stainless steel: about 5mm Compatibility and accessories Compatible with handheld electric drills, stand motor drills, and mobile magnetic band drills Installation Recommended to use cutting fluid or drilling lubricant depending on the material being machined Usage Ideal for cutting clean, round holes in stainless steel, mild steel, iron, copper, and brass Designed for fast and accurate drilling