Standard length
Flat bottom design for a good grip
The kinfe/anvil style laser heat treated cutting edges last longer and cut better
Universal joints are made from chrome alloy steel for added strength and have an easy to clean
other sources of ignition
SM Products 2-1/8″ Tungsten Carbide Tipped Hole Saw Size:2-1/8″ Standard lengthExtreme material versatility and faster cuts up to 10x more cuts and up to 5x faster than standard bi metal hole saws Spyders Rapid Core Eject arbor system ejects cores without prying, quickly changes diameter, cuts at an angle, and enlarges existing holes Drill wood, MDF, plywood, fiber cement board, porous concrete block, some brick, ceramic wall tile, plastic, PVC and more Up to 10x more cuts than bi metal hole saws Up to 5x faster than standard