Toolhangers Unlimited Original I Joist Nail Gun Hanger (Lime #70306) I-Joist Model # 70306 (lime packaging) - accessory for Hitachi Nail Gun Models: NR83A2, NR83AA2, NR83A3, NR83AA3, NR83AA4, NR90AC2, NR90AC3, NR65AK & NR65AK2 Engineered with a wider hook for floor joist up 2 5/16" wide. Springloaded and retractable. Solid steel with zinc plating. The Original Tool Hanger. Work Faster and Smarter! Construction workers & framers  keep your tools in reach! Save time and money! Proudly made in the USA