For the serious metalworkers and welders out there, this 20-pack of Hitachi grinding wheels is exactly what you need for your workshop. Each wheel measures 100mm outer diameter with a 6mm thickness and 15mm center hole - standard size that fits most angle grinders. The A24Q grit rating means they're tough enough for heavy-duty grinding but still give you a decent finish. Perfect for removing weld beads, smoothing rough edges, or general metal fabrication work. The 20-piece quantity means you won't be running to the store every other week - these should last you through multiple projects. They're rated for up to 13,600 RPM, which covers most standard angle grinders safely. The quality is typical Hitachi - consistent, durable, and reliable performance every time. Whether you're a professional fabricator or a serious DIYer, having a good supply of quality grinding wheels on hand is essential. They cut smoothly without excessive vibration and hold up well under pressure. The pack is great value compared to buying individual wheels, and having plenty of spares means you can change them out as soon as performance drops off. Perfect for steel, iron, and other metals - just make sure you're using the right safety gear! Definitely a workshop essential that'll save you time and frustration on your metalworking projects.