LAIWEI 11/16"(17mm Hole Saw) LAIWEI carbide hole saws are available in more than 100 sizes, ranging from 12mm to 200mm. If you need to choose a different diameter from the list, you can customise it to suit your needs. Cutting depth: metal thickness less than 25mm Shaft size: 10mm diameter Applicable tools: Bench drills, machine tools, impact drills, hand drills (can be used but not recommended as too much wobble can easily damage the drill bit) It is recommended to use a bench drill and to keep it steady while working to avoid damage to the drill or hole saw due to wobbling. High-quality hard metal particles and excellent welding technology ensure an extremely long service life. The excellent machining technology of the milling cutters allows for precise cuts and high quality cutting surfaces. Based on thousands of active laboratory tests, LAIWEI hole saws have the same excellent test results and reliable product quality as the best brands on the market. Hole saws are widely used yu in a variety of materials such as: stainless steel, high alloy steel, aluminium, plastics, GRP and PVC. Please note: For different materials such as stainless steel and plain sheet metal, the appropriate speed and feed rate is different, please refer to the table. Stainless steel: 14-21mm hole saw (300-500rpm); 22-30mm hole saw (200-450rpm); 31-40 hole saw (175-315rpm); 41-50 hole saw (125-225rpm); 51-60 hole saw (95-150rpm; 60-75 hole saw (80-150rpm); 80mm above (60-120rpm). Ordinary sheet metal: 14-21mm hole saws (700-1000rpm); 22-30mm hole saws (500-800rpm); 31-40 hole saws (300-600rpm); 41-50 hole saws (200-500rpm); 51-60 hole saws (200-400rpm); 60-75 hole saws (150-300rpm) ; 80mm and above (100-200 rpm). 7x24 customer service