5 IN 1 PACKThere are 5 of 6mm diameter in one package. Moreover, each diamond drill bit is placed in a separate plastic box, which you can find and use easily. DURABLE AND EFFICIENTHigh quality diamond grit for efficient and clean holes. Filled with cooling wax, extremely heat resistant, suitable for dry drilling. C45 tool steel has extremely high stability and works more efficiently. HOW TO USE1) Place the diamond drill at an angle of approx. 30 to the surface of the material and start drilling carefully. 2) Tilt the drill to the upright position once a notch has been made. (For longer life, water or coolant is recommended) MULTI-PURPOSEPerfect for porcelain, glass brick, ceramic, ceramic tile , granite, marble, quartz, limestone, fiberglass terrazzo, masonry, quartz stone and sandstone. WIDE APPLICATION1/4 inch hex shank ( 6.35 mm) which fits all drills, drill chucks and lightweight rotary hammers from Bosch, Hilti, Metabo, Makita, Milwaukee etc.