This is the recommended tool for the following parts: CSH813, CSH820, CSH813P, CSH820P, CSH813AD, CSH820AD, CSH813A286, CSH820A286, CSH813A286P, CSH820A286P
SRW50 W4-A is a drive wrench for positioning compatible inserts during installation. Compatible with CSH813, CSH820, CSH813P, CSH820P, CSH813AD, CSH820AD. This is an old Anemo part. Please use CSHW813, CSHW820
