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3/8" - 1/2" dia. x 7" Drill Hole Blower Cleanout Tool
Carbon Steel Bolt Hole Cleaning Brush: 10mm\3/8".
Nylon Bolt Hole Cleaning Brush: 10mm\3/8".
Carbon Steel Bolt Hole Cleaning Brush: 12mm\1/2".
Carbon Steel Bolt Hole Cleaning Brush Diameter: 16mm\5/8"
Carbon Steel Bolt Hole Cleaning Brush Diameter: 18mm\3/4"