The 1/2 inch 12-point sockets' class='desclinks'>sockets (metric) are crafted from chrome vanadium steel and finished in high chrome. The OGV® profile allows tightening torque to be applied to the sides rather than to the angles of the nut. This product is for manual use only.

ISO 2725-1 - DIN 3124.

The Britool BRIE117069B Socket 12 Point Standard 1/2 inch Drive 27mm has the following dimensions:
Size: 27mm
Length: 43mm
Weight: 192g