Drill bits for masonry/ concrete are ideal for drilling holes for electrical boxes and rosettes. The set comes in a convenient plastic case. The SDS-Plus mounting system allows for quick and easy tool-free crown changes. This is a very practical solution because it saves time while working. INCLUDED: Drill bits Ø 40 mm x 75 mm Ø 65 mm x 75 mm Ø 80 mm x 75 mm Ø 100 mm x 75 mm Ø 125 mm x 75 mm 110 mm SDS-Plus adapter Guide drill