Klein's Flame-Resistant Canvas Bolt Bag is made of flame-resistant No. 4 canvas which meets the performance requirements of NFPA-701 for added protection in the field. It is stitched and riveted with a double-reinforced bottom for durability. Plus it has a convenient tunnel loop for sliding over your belt. 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.