A came is a divider bar used between small pieces of glass to make a larger glazing panel.
[1][2] Of the metal strips, lead is softer and more flexible, making it easier to cut and bend.
The harder metals are used to work with slightly curved lines and pieces that require greater structural support.
[7] Bumpers, or lead spacers, are pieces of cut came strips that are left over.
They can be used temporarily in the glasswork process to hold together two pieces of glass to estimate the spacing of the finished project.