So these T-slot bolts are one of those things you don't realize you need until you start working on projects that require them. You get 12 pieces in the set with different lengths - 3/4 inch, 1 inch, 1-1/2 inch, and 2 inch options, all with 1/4-20 thread size which is super common. The stem diameter is 1/4 inch with head dimensions of 1.2x0.5x0.1 inches. They're made from stainless steel, so they're rustproof and corrosion-resistant - perfect for kayaks, boats, and outdoor use. What's great is how versatile they are - they work with T-nuts, knobs, or T-tracks for all sorts of projects. If you're into kayaking, these are perfect for attaching accessories to your rail system. For woodworking, they're amazing for workholding, positioning, and fixtures on routers, drill presses, table saws, you name it. The installation is straightforward - just slip them into your T-track and secure with knobs or nuts. The quality is solid - they can handle high torque without stripping, which is important when you're working on serious projects. Whether you're building custom kayak setups or need reliable fasteners for your workshop, these T-bolts are definitely worth having in your toolkit. They're one of those specialized items that make DIY projects so much easier and more professional-looking.