This is a 13mm nut driver. It's a hand tool used for tightening or loosening nuts and bolts.
Size: 13mm (nut) x 125mm (shaft length)
Function: Features a socket attached to a shaft and handle
Material: Typically made from hardened and tempered chrome vanadium (Cr-V) with satin chrome plating for corrosion protection
Packaging: Comes in a box with a capacity for 10 pieces, as indicated by the packaging labels.