... segmentthis kind of segments are used by drilling and coring on nature stone, artificial stone and concrete wall, floor, ... road, wall and so on.there are mainly two types of shank: straight and ... request.they are fixed on core drill bits.these bits can be used on all portable and fixed ... 100#, 120#, 180#, 200#, 320#, 400#,and so on.the usually sizes are 24*3.8*10mm, 24*3.6* ...