Drill bit set with countersink drill in 7 different sizes (3 mm/4 mm/5 mm/6 mm/7 mm/8 mm/10 mm) with hex wrench and plastic storage box.With numbers on the drills for easy recognition, it meets the different needs, convenient to carry and store.User-friendly design: use the hex wrench to remove the five-sided chamfer or to adjust the counter depth and drilling depth for screws of different lengths.Versatile use: the countersink drill set contains 1 x hex wrench and 7 x countersink drill in 7 different sizes to meet all requirements.Versatile.Can be used in just three steps:Step1.Turn the hex wrench to adjust the desired length.Step2.If you perform 3 treatments a week, it may take a total of 2-4 weeks for you to see visible results.Press and hold the power button for three seconds to turn it on and choose the suction intensity.Step3.Vertical drilling to the desired depth.The depth should only be so that the screw head can lower underneath the surface.Perfect for wood, fibreboard, chipboard, plywood, plastic, PVC, rubber etc.Suitable for bench drills, hand drilling and traditional electric drills.Tips:1st step: The drill must remain completely vertical when drilling! Otherwise the bit may break easily.2g.If a drill is damaged, you just need to replace the drill.3.We recommend using a drill, the effect is better than a hand-electric drill, which is not fixed during operation, can bend and break.