Blu-Mol Xtreme quick core hole saw system/patented technology allows the operator to engage the quick release arbor to expose the unique open back design/allows for quick and easy core removal with no extra tools needed. Aggressive 10 degree positive tooth angle promotes faster and smoother cuts. One mandrel for sizes 3⁄4” to 6” with a simple side sleeve engagement. 1 7/8” depth of cut. M42 bimetal construction for cutting wood, metal, plastic, and stainless steel.