Hexagonal diameter 0.3 - 0.5 inch (8 - 12 mm), square for 0.6 inch (14 mm) or higher.
The powerful spring plate produces a quiet and quiet continuous sound that allows you to work with ratchets.
The head is thin and shaped glasses that are suitable for work in narrow places (temporary-tightening only: Do not use with bolts or nuts that have rusted. )
Sending angle is 20°

From the Manufacturer

Plate Ratchet Glasses Wrench

The head is thin and suitable for work in narrow spaces.For temporary tightening: Do not use with bolts or nuts that have rusted.Feed angle is 20°.The diameter 0.3 - 0.5 inch (8 - 12 mm) is hexagonal, and the 0.6 inch (14 mm) or higher.