DIYers and machinists, this CHANCS handwheel is exactly what you need for precision adjustments on your equipment! With a 20mm outside diameter and 5mm bore (15mm hole depth), this black oxidized aluminum handwheel gives you solid control without being bulky. The knurled surface provides excellent grip even with oily or gloved hands, and the 22mm height feels comfortable in your palm. Made from corrosion-resistant aluminum alloy with CNC precision machining, this thing is built to last through years of use. The inner hole has arc chamfering for easier installation on shaft holes, and the double top wire fixing ensures it stays secure. I've used these on my milling machine, lathe, and even built a slide displacement platform – they work perfectly for fine adjustments where you need that tactile feedback. Whether you're working with industrial machinery, power tools, or measuring instruments, having a quality handwheel makes those tiny adjustments so much easier. The package includes one handwheel, and they offer a one-year warranty if you run into any issues. If you're tired of cheap plastic knobs that strip or break, upgrading to this aluminum handwheel is totally worth it for the durability and precision alone.