FastenMaster Gapper Deck Board Spacer (Zip System)

The FastenMaster Gapper is a professional-grade deck spacing tool built to speed up installation while locking in consistent, uniform board gaps across the entire deck. Part of FastenMaster's Zip System, the Gapper's single-clip design lets installers back out and reposition boards mid-install for precise alignment — without slowing down the job or sacrificing accuracy. Built for contractors running high board volumes, the Gapper reduces the number of installation steps compared to manual spacing methods, cutting both labor time and the guesswork that leads to uneven gaps. Why Use the Gapper Cuts installation time with fast, repeatable board spacing Single-clip design allows boards to be backed out and repositioned for perfect alignment Delivers consistent, professional-grade gaps across the full deck Built for high-volume, pro-level deck installations Part of the FastenMaster Zip System What's Included (2) 48" spacing tools with adjustable spacers (4) additional loose spacers Specifications Tool length: 48" Adjustable spacer configuration Compatible with FastenMaster Zip System components Frequently Asked Questions What is the FastenMaster Gapper used for? The Gapper is a professional deck board spacing tool that sets consistent gaps between boards during installation, speeding up the process while ensuring uniform spacing across the deck. Can I reposition boards after clipping them with the Gapper? Yes — the single-clip design allows boards to be backed out and repositioned as needed during alignment, giving installers more control without added installation steps. Is the Gapper part of a larger system? Yes, the Gapper is part of the FastenMaster Zip System, a broader deck fastening and spacing platform.