Diamond Finger Milling Chamfer Bits 10-25mm - For Enlarging & Shaping Holes In Tile, Marble & Granite

About This Product

Alright, these diamond finger milling bits are for the serious DIYers or pros working with hard materials like ceramic, porcelain, marble, and granite. The basic idea is pretty clever - you use a standard diamond core bit to make an initial hole, then use these milling bits to enlarge it or shape the edges to exactly the size you need. They come in diameters from 10mm to 25mm, so you've got a good range to work with. The total length is 65mm with about 50mm of working depth, and they have a 5/8-11 thread shank that fits most angle grinders. The diamond grains are #50/60 grit which gives you a nice balance between cutting speed and finish quality - they'll chew through hard materials without leaving too rough of an edge. They use vacuum brazing technology which basically means the diamonds are securely bonded to the surface so they last longer and perform better. The recommended speed is around 6000 RPM with a max of 11000 RPM, so make sure your grinder can handle that. If you want to use these with a drill instead of an angle grinder, you'll need an adapter for the different shank types. But the main advantage is cost-effectiveness - instead of buying multiple core bits for different hole sizes, you can get one standard bit and then use these to create various sized openings. Super handy for tile work, countertop installations, or any project where you need precise holes in hard materials.