MINIGRES diamond tips are ideal for drilling stoneware tiles, porcelain tiles and pieces of granite and marble. Available in 5 diameters: 6, 8, 10, 12 and 14 mm. They are perfect for installation of accessories and decorative extras. When we have to drill to make wall plug enclosures, it is recommended to only drill the wall lining material (ceramic tile, natural stone, etc.) and to finish the drilling for the plug with a twist drill bit. The diamond rim of MINIGRES tips is sintered and joined to the drill bit body by laser welding. MINIGRES diamond tips must ALWAYS be used water-cooled and with a non-percussive power drill. The use of the drill HEAD with a 1/2" thread (ref. 04937) and SWIVEL COUPLING (ref. 50907) is essential. The average life of the MINIGRES diamond tips is 40 holes and ALWAYS depends on the type of material, its thickness, proper cooling and use. The drilling depth of MINIGRES diamond tips is 35 mm. The MINIGRES diamond tips have no side opening for solid waste disposal, so before making a new hole you must ensure that the drill bit is clean and free of any obstruction. The maximum speed of use for MINIGRES tips is 1200 rpm. For a better finish and a longer drill bit life, it is important to respect the proper rotation speed and exert moderate pressure during drilling. RUBI is present in more than 120 countries through our network of sales offices and authorized distributors. For this reason we make it easy for users around the world to find our tools and spare parts. Contact us at "Discover RUBI" or any of our social networks for information on where to find a dealer, we will gladly help.