Fast and clean cutting, suitable for drilling sheet metal, steel pipe, stainless steel, aluminium and fibreglass reinforced synthetic materials. 5mm cutting depth in stainless steel when used with a battery drill 20mm cutting depth in stainless steel when using a low-speed drill press 50mm cutting diameter Premium quality TCT teeth for clean, accurate holes Replaceable pilot drill Ejector spring for disc ejection Fits standard chucks, complete with arbor Available in sizes: 16mm-65mm 10-piece kit available with sized ranging from 16-40mm Example Speeds (Drill Press) Cutter Material Depth/Wall Thickness Speed (RPM) 16mm Stainless Steel Tube 3mm 700 16mm Stainless Steel Plate 10mm 200 20mm Stainless Steel Tube 3mm 500 20mm Stainless Steel Plate 10mm 170 25mm Stainless Steel Tube 3mm 400 25mm Stainless Steel Plate 10mm 140 *Maximum 550RPM with hand-held drills, additional pressure required.