1.Use for Tuckpointing, Shaping of Mortar, Masonry, Stone and more. Use it for touch ups or to clean up areas you can't reach with a diamond blade. 2. It is better suited and easier to use on intricate and delicate work, particularly vertical joints and natural stone jobs where a blade is often awkward to use and couldcause damage to important brick work or valuable stone. 3. Our diamond bit has used vacuum brazed technology ,which increases resistance to temperature and friction,to make the diamond particles better attach to the core steel,imporve the sharpness and lifetime. 4. Quality Creates Better Life. All our products are subjected to strict quality tests. We want all the products can be recognized for their quality and durability. 【Attention】 Make sure the shank is straight and smooth when installing. Do not exceed the maximum safe speed of RPM 11000. Do not push, twist, bend or apply pressure to the tip of the bit.