Tile Hole Saw Kit - Brschnitt Diamond Core Drill Bit Set 6/8/20/25/35Mm Drill ?Size --6/8/20/25/35mm, diamond height 10mm, total length 65mm,Triangle shank diamond core drill bit ?Size --1pc 1 3/8Inch (35mm), 35mm workable length, hex shank chamfer bit, Grit #80, total Length 65mm,Top Angle 53degree ?Wide Applications --Diamond core bits are worked great for dry drilling holes through hard porcelain tile, ceramics,bathroom tile,granite marble, masonry, concrete, glass, hard plastic with ease. Using water could prolong the lifetime ? Cost-Effective --You could use only one size core bit and this chamfer finger bit to create different size of holes,which will save your money greatly! ?Machine --Suitable for any electric drill,hand drill,Bench Drill, When use Angle Grinder,please install angle grinder drill chuck