PREMIUM S2 STEEL: Ball end hex bits are made of excellent industrial grade S2 steel material for superior hardness which it's reaches 61RCH, ball end allen bit set be black phosphate finish by surface for good anti-rust and anti-corrosion functions, which is more stronger and durable than others, don't worry it will be rust or corrosion in the rain. EASY IDENTIFICATION: 12 Most popular allen drill bit metric sizes which is 1.5mm*2/ 2mm/ 2.5mm*2/ 3mm/ 4mm*2/ 5mm/ 6mm/ 8mm/ 10mm, 1/4 inch hex shank with 100 mm long, each hex bits are clearly marked with laser etching, making it easy to identify the size and type of bit you need. KINDLY TIPS: Due to low torque to can't increase effort , ball end hex bits are more great for 1/4'' hex shank screwdriver or other hand tools; not well for power drill because of low torque, that it will leads to ball end will be rounded over, we strongly recommend that using it on hand tools for the best results! CONVENIENT STORAGE ORGANIZATION: Ball end allen hex key set comes with a durable plastic bit holder for easy storage, ideal for those who want to stay organized and save time while looking for the right tool. WIDE APPLICATIONS: Ball end allen wrench set can tighten the screw in vertical or inclined side, suitable for limited space. Ball End hex bits built-in magnetic, can be easily keep screws stuck to them. Perfect hex driver set for Ikea type furniture, an indispensable part in our life, it also a nice choice of present for your family and friends. Introducing the Lattook Ball End Hex Head Allen Wrench Drill Bit Set, a 12-piece set of superior strength and durability. The bits are made of industrial-grade S2 steel, providing exceptional hardness with a black phosphate finish for excellent anti-rust and anti-corrosion properties. Each bit is clearly marked with laser etching for easy identification of the size and type. The set is ideal for use with 1/4'' hex shank screwdrivers or other hand tools, providing convenience for tightening screws in vertical or inclined sides. The built-in magnetic feature keeps screws stuck to the bits, perfect for Ikea-type furniture. The set comes with a durable plastic bit holder for easy storage and organization. This drill bit set is suitable for a wide range of applications, making it an indispensable part of your toolkit. The product dimensions are 4'' long with a shank diameter of 0.25 inches, and it includes 12 pieces of S2 steel drill bits. Care instructions include avoiding exposure to water and storing in a dry place to prevent rust and corrosion.