Alright, this is a TCT (Tungsten Carbide Tipped) annular cutter – sometimes called a Rotabroach or Slugger cutter. It's used with a magnetic drill press to make clean, large-diameter holes in metal. The cutting depth is 50mm (about 2 inches), so it's good for thick stock. It's listed as \New,\ so it's unused and ready to go. These cutters are way more efficient than standard twist drills for big holes – they remove a core (the \slug\) instead of grinding away all the material, so it's faster and puts less strain on your drill. Perfect for steel fabrication, construction, automotive work, or any metalworking where you need precise, burr-free holes. They're often used on I-beams, plates, pipes. Just make sure you have a compatible magnetic base drill (mag drill) that can hold this style of cutter. A must-have tool for pros or serious DIYers working with heavy metal. Makes drilling large holes a breeze compared to traditional methods. Super durable thanks to the TCT teeth. Gets the job done quick and clean.