Door hardware terminology: a small wooden block hinged on the post outside a door, used to hold or secure the shutter, is commonly known as what?

Introduction / Context:
Site carpentry uses specific terms for simple door accessories. Correct naming improves BOQ descriptions and communication with artisans.

Given Data / Assumptions:

• A small wooden block is hinged on the post outside a door to retain or secure the shutter.
• We distinguish between stops, cleats, and horns.

Concept / Approach:
A door stop (or rebate) is usually a fixed strip on the frame, not hinged. Horns are projecting ends of door/window frames embedded into masonry, not accessories. A cleat in carpentry is a small block or strip that can be fixed or hinged to catch/retain a shutter—fitting the description given (a simple hinged block outside acting as a hold-back).

Step-by-Step Solution:
Identify the key feature: hinged small block on the post outside.Match with terminology: this aligns with a hinged cleat used to hold the door.Therefore, select 'cleat'.

Verification / Alternative check:
Traditional joinery details show hinged wooden cleats/turn buttons used to retain shutters; stops are fixed.

Why Other Options Are Wrong:

• Stop: fixed rebate/strip; not hinged and typically on the closing face inside.
• Horn: frame projection for embedment in masonry.
• None of these: incorrect because 'cleat' matches.

Common Pitfalls:

• Calling any retaining piece a stop; here the hinging feature distinguishes a cleat.

Final Answer:
cleat