Up for sale is an equivalent IR 231-TK3 Tune Up Kit. This quality kit fits IR models IR231 / IR231C- 1/2? dr. impact wrench. A quality kit that works! These kits have all the ?soft parts? for the throttle and air motor (also includes motor bearings) and a socket retainer and oring for the shank. This kit will only fit IR model 231 pivot style triggered tools and not the IR 231HA style of triggered tools. This kit has plastic blades to replace the OEM blades. Some signs of needing a rebuild would be the obvious loss of power or that persistent air leak. The nice part is the IR 231, 231C are fairly easy tools to rebuild and this kit will put your gun back at the top of your shop! Warranty would only apply to proper install of parts! Usually ships in 24 hours!