These spreaders are designed to fit the 420.
The spreaders are sold in pairs and the spreader tip is removable so they can be retrofitted onto existing diamond stays. This is a simple solution for the club racer who isn't looking for the numerous adjustment options that the Selden spreaders provide.
If you are upgrading to these spreaders, you will need to order one (1) pair of spreaders and one (1) spreader bracket. Clevis pins are included with the spreader bracket; rivets to attach the bracket to the mast are sold separately.