Bon Tool - 82-389 - 10-Pack 3/4-in Bar Clamp Tweet Description Clamps to standard 3/4 in. round form pin to hold screed bar parallel to form boardsHolds up to 1-3/4 in. screed bar, lumber or pipeCast iron Details Category: Hand Tools Model Id: 82-389 Product Brand: Bon Tool Subcategory: Clamps & Vises