XL-Arbor Kit for Hole Saws&ndash;Adapts Hole Pro shields for use with any hole saw, for X-model adjustable hole cutters. XL Arbor adjusts cutting depth control - hole cuts easy-SHIELD NOT INCLUDED XL-Arbor Hole Saw Adapter works with all Hole Pro shields and any hole saw For all -20 and 5/8-18 thread hole saws with up to 2-1/2 (60mm) cutting depth Includes: Tensioning spring, Release bar, Hex wrench, HSS pilot bit, Includes: 2 hole saw spacer discs, and sturdy nylon storage pouch REQUIRES: Shield & Orange Knob from the Hole Pro X-model