This RIDGID 59167 HC450 Gear Worm is a genuine replacement part manufactured by RIDGID. The RIDGID 59167 HC450 Gear Worm is specifically designed for use with HC450 Hole Cutters. The idea behind a replacement or repair part is replace or improve the damaged part, and keep the intended tool functioning properly. The RIDGID 59167 HC450 Gear Worm prevents your tool from further malfunction and is fully covered under RIDGID's lifetime warranty, giving you the peace of mind that comes with the quality of all RIDGID products. For the most convenient and easiest online ordering of service RIDGID parts, look no further. Plumbersstock.com has an extensive list of over 600 RIDIGD Repair and Replacement Parts.