This is a solid, professional-grade hex bit from Bondhus. It's a 1-inch size (that's the hex key size that fits into the screw) and it's 2.5 inches long overall. The cool feature is the ProHold button – it's a little ball detent that helps keep the bit securely in your socket or bit holder, so it's less likely to fall out when you're working. It also has their ProGuard finish for extra corrosion resistance. The tip is chamfered (beveled), which helps it seat into screw heads easier and reduces burrs. The sharp corners mean you get maximum torque transfer and less chance of stripping the screw. This bit is designed to fit into any standard 1/4-inch, 3/8-inch, or 1/2-inch drive socket (six-point). A reliable bit for your toolbox, whether you're a pro or a serious DIYer.
