Gedore Socket AF3/8 with 1/4 hex drive

Amazon

External hexagon drive according to DIN 3126 - C 6.3 (1/4 inch) for use in chucks Sandblasted A product line of the brand GEDORE, Weight: 0.00220462262 pounds, Manufacturer: GEDORE

Zoro Tools

For hex bits as per DIN 3126 - C 6.3 + E 6.3 (1/4") Sand-blasted