Spyder RCE TCT Hole Saw 4-1/2 In.
Tungsten Carbide Tipped Hole saw that cuts just about anythIng.
Remove the core at the push of a button
Easily cut hole at an angle
Double stack two cups together to enlarge holes.
Cuts Wood, Plastic, Cinder Block, Brick, Ceramic Tile and much more
Fits Spyder hex 10 arbors