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Revenue Recognition (Tables)
 12 Months Ended
Dec. 31, 2019
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
Disaggregated revenue by product type follows:
 
Unaudited
 
Year Ended December 31,
Product Category
2019
 
2018
Fastening systems
24%
 
24%
Fluid power
15%
 
14%
Cutting tools and abrasives
13%
 
15%
Specialty chemicals
11%
 
12%
Electrical
11%
 
11%
Aftermarket automotive supplies
8%
 
8%
Safety
5%
 
5%
Welding and metal repair
2%
 
2%
Other
11%
 
9%
 
100%
 
100%