Carpenters and DIYers, if you work with framing squares for stair stringers or roof rafters, these stair gauges are a simple but incredibly useful addition to your tool kit. The set includes 4 gauges plus a holder with carabiner, so you can keep them organized and easily accessible. Made from anodized aluminum, they're lightweight but seriously durable - won't break or deform like plastic gauges can. The hexagonal surface design is smarter than circular gauges because it provides better contact with the square's edges, giving you more precise markings and measurements. They're taller than many standard gauges, which helps keep your square perpendicular to the material you're working on for more accurate layout work. The compact size (about 1.85x0.83 inches each) makes them easy to store in your tool belt or bag without taking up much space. You can use them for all kinds of layout tasks - stair stringers obviously, but also roof rafters, angle marking, or any situation where you need to repeatedly transfer measurements from your framing square. The holder with carabiner is a nice touch - clip it to your belt or tool bag and you'll always know where your gauges are when you need them. Whether you're a professional builder tackling complex staircases or a homeowner doing occasional projects, these gauges make working with a framing square more efficient and accurate. They're one of those small tools that once you start using, you'll wonder how you managed without them.