The Freeman RPFR2190D Replacement drive blade and bumper kit is designed to rebuild and repair The internal firing unit of the Freeman PFR2190 21 degree framing Nailer, Nuka SFR2190 21 degree framing Nailer, and Husky HFR2190 21 degree framing Nailer (red body). This kit includes a long lasting and Durable one piece heat treated steel drive blade with a lightweight aluminum base, high quality rubber bumper, and Teflon O-Ring for oil-free applications, High performance, and internal sustainability (pieces 24, 25, 26, and 28). refer to the parts list for part Number identification and installation.