Sollar 11Pcs Concrete Hole Saw Kit With 300Mm Sds Plus Max Shank And 2 Drill Premium Material: The appearance of concrete hole saw set adopt industrial-grade sandblasting technology,which has the function of rust prevention to ensure exquisite appearance no scratch. Unique Design?Double chip removal hole effectively prevents debris clogging,external chute with threaded design removing debris easily,greatly improving work efficiency.The concrete hole saw kit features a center positioning dril,simple to operate, easy to use and fast perforation. 2024 New Upgrade Process:The process of concrete hole saw has also been upgraded,equipped with Harden High Carbon Steel Boday Plus and YG9 Tungsten Carbide Tip,ultra-sturdiness and durable,easy to opearation,and long service life.Internal and external three edge,front and back angle design,layers component cutting,more accurate positioning. 11 PCS Concrete Hole Saw Kit:The concrete hole saw set contains 5 different diameters of concrete hole saws, 40mm(1-9/16"), 65mm(2-9/16"), 80mm(3-1/8"), 100mm(3-15/16"),125mm?5"?,1 x SDS PLUS Shank(300mm/11-13/16"), 1 x SDS Max Shank(300mm/11-13/16") and 2x center positioning drill bits ,2x positioning drill screw. Wide Application:The tool plastic box packaging, prevents the teeth of the concrete wall hole saw cutter from being hurt by external forces during transportation. Different diameters of concrete hole saws apply to different drilling diameters and improve the versatility.