These are genuine OEM Metabo HPT 886107 Guide Lock and 880446 Spring tool replacement parts. Made of durable metal material, these tool parts are built to last. The 886107 Guide Lock and 880446 spring are both compatible to Nailer tool models such as NV65AH, NV75AG, NV85AG, NV50AE, NV65AH2M, NV75A5M, NV65AH2, NV90AB2 (sold separately); while the 880446 spring is also compatible with many other Nailer tool models such as NV50AP3, NV50AG, NV85AG, NV45AC, NV90HMC, NV50AH, NV65AD2, and NV90AB (sold separately). Please reference the tool manual before purchasing to ensure the proper fit and usage of these replacement tool parts.