* Pipe taps are used for threading holes created by a hole saw to receive a threaded pipe. Reference to the product charts for proper selection. Example: to cut a hole for a 1" pipe tap, select a 1-1/8" hole saw.

* Pipe entrance is the diameter of the hole through which a pipe of a given diameter will pass during installation.

* Pipe size is defined by the inside diameter. See Bi-metal hole saw listing. To cut a hole through which a 3/4" pipe may be passed select a 1-1/8" hole saw.

* Tubing size is defined by the outside diameter. To cut an entrance hole of a given tubing diameter, it requires the same diameter hole saw.

M2 and M42 material available.