Sandflex bi-metal hole saws perform excellently in most materials such as wood, plastic, non-ferrous and ferrous steels, including stainless steel. The bimetal design features 8% cobalt for higher wear resistance. They are suitable for electric drills, both stationary and portable. Side slots enable quick and easy removal of the cores, with a maximum cutting depth of 38 mm (1 1/2"). The hole saws have 4/6 teeth per inch, and the maximum hole size is the nominal hole saw size plus 1.5 mm, minus 0.0. All -C hole saws come in self-service packaging with instructions, which also serves as a tooth guard. Designed for professional use, these hole saws have a standard holder for various shanks and offer high quality in terms of precision, service life, and versatility. No matter what you want to cut, we have the hole saws and shanks you need to master every task, day after day. From the design of the cutting edges to the manufacturing method, these hole saws are engineered to increase sawing productivity and skill.