Thumb break

A thumb break or retaining strap is a safety device installed on many holsters and sheaths to prevent a weapon from being unintentionally drawn.

It also secures the weapon in the holster or sheath when its owner is engaged in vigorous activities such as parachuting, rappelling, or fighting.

The thumb break is made of the same material as the holster or sheath (i.e., leather or nylon), and may either be permanently attached or removable.

Some self-defence experts have advised removing thumb breaks, except for people employed in enforcement (who are at greater risk of encountering someone who may try to grab their weapon).

[2] Modern form-fitting holsters and sheaths have greatly reduced the necessity of a thumb break retaining device.