www.pmmag.com/articles/88103-reed-hole-cutting-base
Reed Hole-Cutting Base
August 1, 2003

The Hole Master[R] hole-cutting base from Reed Mfg. Co. provides a means of clamping onto pipe and using a drill to cut a hole in the pipe. Requires a hole saw or bit (sold separately) and does not need an adapter for small-diameter pipe. Pipe diameter mounting range is 1 1/4 inches to 10 inches.
Circle 20