[Wide Application] --Worked great for dry drilling clean holes through porcelain tile shower walls, ceramics, bathroom tile,marble granite,stone,masonry,brick,stucco,counter top with ease,Using water could prolong the lifetime of the tile drill bits
[Vacuum Brazed Technology] --Increases resistance to temperature and friction,provide 5x the working life compared with electroplated bits,more heavy duty and wear resistant.High-quality core steel body helps to be more efficient and durable,not easy to deform,you could drill smoothly with no broken edges
[Machine] --angle grinder (direct connection) or electric drill (with adapter ).Aluminium portable suitcase included. For easy carry and storage and protect of the core bit.Recommended RPM is 6000; Maximum RPM is 11000