Tape Measure Disc

[Wills03]

I picked up a metal disc with serated edges that slips on tapes factory hooks and allows the hook to grab from the top or bottom a couple years ago. It is about the size of a quarter. I lost it the other day and do not recall where it was purchased. I know it was an impulse buy at a hardware or lumber yard counter but have not seen one lately. I think the name and web address were ecthed in it but that is not doing me any good now. I find the little $1.00 thing quite useful sometimes. Any body know where to get them?

Thanks
Wills