Spacer has been used for mock up but project changed directions so crank spacer was traded in.
Spacer is used on a BBC/KB Olds bearing support application where a racer is using a front mounted mag drive such as #2500-0010F where you have to space the crank pulley out to clear the mag drive.
Note: This is a used item. This item might have been taken in on a trade. RBS may have inspected this item and deemed re-usable. There is no warranty expressed or implied with this item.