A socket set, specifically the OAYKAY Tools 12.7mm (1/2") Drive Socket Set. This set seems to come with 27 pieces, including 22 sockets and 5 accessories, all made of Chrome Vanadium Steel. The sockets are likely in various sizes to fit different nuts and bolts. The set seems to be designed for professional use, given the quality of the materials and the number of pieces included. The mirror-polished finish adds both aesthetic appeal and durability, while the metal box provides storage and organization for the sockets and accessories. Overall, it sounds like a comprehensive and high-quality socket set for various mechanical and DIY tasks.