Hole Cutter (works with Dremel) 19 sizes (metric + imperial)

Works with rotary tools like Dremel, Wen, HyperTough, etc.
Attaches using 3/4 threads. 
Cuts 19 sizes of holes from 2"-6.5" 
Use 1/8" cutting bits like Rotozip

Edits: 

Added Metric version 

Added slider insert version that allows the user to insert the Dremel or rotary tool after the cutter is mounted to cutting surface

Added Metric slider insert version