No. 4 canvas with double bottom for added durability Bolt bag with bull-pin loop on each side Stitched and riveted for added strength Having durable storage solutions on the jobsite is a must. Klein Tools' Bull-pin and bolt bag is built from sturdy canvas with a double layer of canvas on the bottom where it's needed most. It is also stitched and riveted for added strength. No. 4 canvas with double bottom. Featuring Bull-Pin loops on each side. Tunnel belt connection accepts belts up to 3-inches wide. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and Craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our Company, it's also our family name. And since we're an American Company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day... Since 1857. Cancer and reproductive harm - See www.P65Warnings.ca.gov for more information.