This versatile drill set is ideal for a variety of drilling jobs in wood and plastic. The set includes 7 drill bits with a diameter of 3 to 10 mm, as well as a hex wrench. The drills are made of HSS high-speed steel, which ensures their accuracy and durability. The drills also come with an adjustable drilling depth limiter that allows you to drill and countersink holes for countersunk head screws. In the set: Key for adjusting the height of the sinker 7 countersunk drills: 3 mm x 60 mm 4mm x 75mm 5mm x 85mm 6mm x 93mm 7mm x 100mm 8mm x 110mm 10mm x 120mm