Shelf Brackets without machined ends are designed to be used without any hardware attached to the tip or end of the bracket. They are finished on the end for use as shelf supports that need no additional hardware to complete them.
Shelf Brackets with No Ends are available in 8", 12", 16" and 20" lengths. They use 5/16-18 thread V-Groove Pins for attachment. A double-ended Shelf Bracket that's also available is 18-1/4" long and is customizable for attachment. The StructureLite Catalog has application ideas on page 150.