9 in 1 Screwdriver Set, which includes 2 flat screwdriver heads and 7 star screwdriver heads, 1.5, 2, 2.5, 3, 4 mm, and two Philips screwdriver heads. Storage of spare screws: Thanks to the threads on the side of the set, spare screws can be stored in sizes M3, M4, M5 and 1. All-metal design: The screwdriver set is made of solid stainless steel and the sides are made of strong aluminum alloy. Portability: Compact and easy to carry, a perfect alternative for travel and outings. Thanks to its compact size, it can even fit in your pocket.