Description of MaxTool 2 18UNF Thread Drills BA28H1806 M44N6
Standard Arbor with 1/2-20UNF thread fits up to 1-3/16" Hole Saws. Tool-free release collar to prevent hole saws from locking to the mandrel. Includes 1/4"x4" Overall Length HSS M2 Fully Ground Pilot Drill Bits. Set screw in the body for replacing Pilot Drills. Quality tool steel with precision heat treatment.
This is a hole saw mount. It looks like it's made of metal. This is a step in the right direction. Haven't used it yet but I'm sure there's a hole that needs to be cut out any minute.