This RIDGID 37318 RP210 Steel Ball (4mm) is a genuine replacement part manufactured by RIDGID. The RIDGID 37318 RP210 Steel Ball (4mm) is specifically designed for use with 210-B Press Tools. The idea behind a replacement or repair part is replace or improve the damaged part, and keep the intended tool functioning properly. The RIDGID 37318 RP210 Steel Ball (4mm) 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.