This is a home paint brush hanger / wall hook. It is designed to hang up to 6 brushes. The hanger is about 8 inches (203mm) wide about 2 inches deep (49mm) and about 1 inch (24mm) tall.

The space between the hooks (clearance) is 0.688 inches (17.5mm) which seemed to be enough for the brushes I had on hand but may not be large enough for all brushes.

There are two counter-sunk screw holes intended to accept some small dry-wall type screws. The hole diameter is 0.179 inches (4.55mm).