Force brand, original from Taiwan, professional tools.

Drop forged from Chrome Vanadium Steel, heat treated.

Satin chrome finish for corrosion protection, polished bi-hexagon ring.

Off-set 12 points ring spanner with 75 degree offset angles are designed to provide access to nuts or bolts with some type of obstruction, apart from permitting a solid grip for the hand by means of their angle.
This type of wrench has a different box end size on each end.
The 75 degree angle is recommended for applications in which the nut or bolt is in low relief, ideal for when there is not much space in the height parallel to the spin axis of the part. 
Two options:
1. K51218 12pc set, all sizes are well kept in a EVA foam tray. Size includes:
6x7, 8x9,10x11, 12x13, 14x15, 16x17, 18x19, 21x23, 24x26, 24x27, 25x28, 30x32mm.
2. T5044 4pc set, all sizes are well kept in a solid PVC box. Size includes: 23x26; 24x27; 25x28; 30x32 mm.