Thread: Occupations
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Old 10-13-2017, 01:17 PM   #3
xoxoxoBruce
The future is unwritten
 
Join Date: Oct 2002
Posts: 71,105
It's the melted metal backing plate for the long gone pad.
I got a kick out of the secret tools. On the left is a large socket on a right-angle die grinder which spins at a minimum 12,000 rpm and could be 20,000 rpm.
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