http://tinyurl.com/ka4tcet
MK Morse AV06I Master Cobalt Bi-Metal Hole Saw Industrial Kit
Backer, cutting edge and cap work together to provide faster, longer-lasting cutting action
Positive rake teeth clear chips better for longer life and easier cutting
Bi-metal design bonds M3 cutting edge to fatigue resistant backer
Teeth stay sharper and make smoother cuts
Includes 15 Hole Saws, 3 Arbors, 1 Extension