Spyder 5/16″ Diamond Hole Saw Bit Automatic Center Punch blade set and has a

blade set and has a 1 In

Thermostat for temperature control

Comes with 2 sharpening stones

nylon screen frame corners

Spyder 5/16″ Diamond Hole Saw Bit Automatic Center Punch blade set and has aUp to 20x more holes than standard diamond hole saws. Up to 10x faster than standard glass and tile hole saws. Premium boron coated, industrial diamond abrasive self sharpens for quick cuts and long life in tough tile masonry materials. High temperature, nickel braze adheres at temperatures up to 1. 5x the braze of standard diamond hole saws, for increased diamond abrasive retention. Can be used wet or dry water spray or immersion will increase tool