HighFree 15 53Mm Cutting Opener Stainless Review

【HSS Hole Saw Kits】Package Included 15pcs hole saw: 15mm/0.59", 16mm/0.63", 18mm/0.71", 20mm/0.79",21mm/0.83", 22mm/0.87", 25mm/0.98", 26mm/1.02", 28mm/1.10", 30mm/1.81", 35mm/1.38", 40mm/1.57", 45mm/1.77", 50mm/1.97", 53mm/2.09". 【High Quality】64HRC to 65HRC. The gears is made of premium high speed steel. It has the property of sharp, resistant to cutting, low consumption and long service life. Chip removal, with excellent performance, sharp edge, wear-resistant. 【Feature】This product applies central spring design. It can control the amount of feed and helps chip removal, avoiding damage to the drill bits.Each edge is a part of the characteristics of the cutting work, making the hole is not easy to produce the phenomenon of collapse. 【High Efficiency】Sharp knife edge, high hardness helps cut quickly and preciously. Carbide teeth for fast cutting of clean, round holes. 【Application】Suitable for hand held electric drill,bench drill, stand motor-driven drilling machine and so on. Used to drill holes in stainless steel, mild steel,iron,angle steel, aluminum alloy, copper, perspex etc. Can drill about 20mm(7/9") depth for the wood, and can drill about 5mm(1/5") for the stainless steel