Brand - Black and Decker Type – Screwdriver Set Model – A7189-XJ Screwdrivers kit contains 30 pieces Contains 17 pieces Different sizes drills to dig wood, metal and plastic 13 different pieces of screwdriver bits fits all types of screws Masonry drilling - 5, 6, 7 & 8 mm bits Metal drilling - 1.5, 2, 2.5, 3, 3.5, 4, 5 & 6 mm bits Wood drilling - 3, 4, 5, 6 & 7 mm bits Screw-driving - 4 x 50 mm bits & 7 x 25 mm bits Functions This 30 piece drilling accessory set contains drill bits for masonry, metal and wood drilling as well as screw-driving bits so you have everything that you need to get started on any DIY home improvement task. The hand toolkit set comes in a handy, storage case that features a transparent cover for quick, easy identification of accessories, and is also designed with removable bit holders so that anyone can remove the bit bars from the case for ease and convenience. The hand toolkit bits are made from titanium metal to ensure long-lasting drill bits that achieve professional results. Black and Decker Screwdriver set – A7183-XJ The black and decker A7183 drill bit hand toolkit contains 17 drill bits and 11 screwdriver bits, plus a magnetic bit holder and a countersink bit. The masonry drill bits are 5, 6, 7, 8mm. There are 8 metal drill bits ranging from 1.5-6mm. The brad point wood bits are 3, 4, 5, 6, 7mm. The Titanium drill bits provide a longer lasting performance. There are 7 screwdriver bits are 25mm in length and 4 that are 50mm and cover all standard fittings. The magnetic bit holder makes screw driving so much easier as the screw will stay on the drill bit, rather than needing to be held in place. The countersink bit allows anyone to create the perfect finish in any screw driving tasks.