Bosch Professional Multi Material Hole Saw 168mm Threaded 2608901545 digital-measuring-tools 6mm wall thickness (more than

6mm wall thickness (more than other brands) which provides the cutter with more strength

Or you could use the EXPERT ‘Hardwood 2-side clean’

Appropriate for: Soil

1 x socket adapter 1/4" female to 3/8" male

Bosch Professional Multi Material Hole Saw 168mm Threaded 2608901545 digital-measuring-tools 6mm wall thickness (more thanPRO Multi Material for Long Life Cutting Holes in Various Materials Last up to 2x longer than a standard HSS M3 hole saw due to 8% cobalt Electricians and plumbers working on interior construction find hole saws invaluable for installing pipes, electrical boxes, and recessed lighting. Ideally, they want to carry just one kind of hole saw for the challenges and materials that interior installation presents. That's why we have the PRO Multi Material.