Fits Cannon Downrigger Release Pin with Knob and Spring Low Profile Swivel Mounting Base Fits Both Old & New Style Low Profile Swivel Bases (WILL NOT FIT PEDESTAL MOUNTS OR HIGH PROFILE SWIVEL BASES) KIT INCLUDES: Knob, Pin, Nut, Spring. Replaces 2249001 3392600 2277001 2287002 Fits Cannon Downrigger Release Pin with Knob and Spring Low Profile Swivel Mounting Base