Hey DIYers and professionals, these DMiotech rubber thread protectors are seriously handy little gadgets! You get 25 pieces total with five different inner diameters - 1/4, 3/8, 1/2, 5/8, and 3/4 inches (that's about 6mm, 9mm, 12mm, 16mm, and 19mm). The black rubber material is soft and flexible yet surprisingly durable and wear-resistant. They provide excellent dustproof and waterproof protection, making them suitable for both indoor and outdoor use. The insulation properties mean they're even safe for electrical applications. You can use them for protecting screw and bolt threads, covering pipe ends, adding wear-resistant protection to furniture feet, or as protective covers for fences and railings. Installation couldn't be simpler - just push them onto whatever you're protecting. The flexible rubber stretches to fit snugly and stays in place. A quick tip - if you're having trouble getting them onto pipes or bolts, a little lubricant can help them slide on easier. These little caps prevent damage to threads during storage or transport, protect against corrosion, and keep dirt and moisture out of important connections. They're also great for preventing scratches on floors from furniture legs or protecting sharp threads from causing injuries. The small size and light weight make them easy to carry in your toolbox. Whether you're a mechanic, woodworker, plumber, or just someone who likes to keep their gear in good condition, these thread protectors are incredibly useful. They're one of those simple, inexpensive solutions that save you from bigger problems down the road. Seriously, once you start using these, you'll find all kinds of applications for them around your workshop or home!