[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] --suitable for any electric drill,hand drill,Bench Drill, When use Angle Grinder,please install angle grinder drill chuck.Aluminium portable suitcase included. For easy carry and storage and protect of the core bit.Recommended RPM is 6000; Maximum RPM is 11000