Description of πͺ Enhanced Cutting Tools: LENOX Tools Bi-Metal Speed Tech through Hole Saws & Accessories
2X more durable with 50% longer life than previous LENOX hole saws. Increased wall thickness improves durability and minimizes tooth loss. Optimized tooth design penetrates metal with ease. Larger, sharper teeth for faster cutting. SPEED SLOT staircase design for easy plug ejection. Speed Slot features a staircase design for easy plug removal. Up to 2X Life in Metal Cutting. Enhanced tooth geometry, a thin kerf design and an advanced coating contribute to the efficiency of the cutting process
Cuts through wood and fiberglass with ease. Side slits make it easier to remove material. This is required when installing through-chassis marine transducers. Ideal size for sensors like Airmar B175.
Pros
Speed Slot is a stepped design for easy plug removal
These bits are great. However, if you do not know the correct RPM for the material you are cutting, you could damage the bit. I use them to cut holes in truck bodies to attach a fifth wheel. Make sure you have a large drill that spins at lower RPMs, 60 to 100, or you will damage the drill.
Love these Lennox hole saws! They never clog their teeth and do not clog their teeth. I've tried a few other brands and other brands seem to be tinted with maple syrup or something. I never have to pull the plugs out of the saw after work, they usually fall out after a few pulls on the drill trigger.