Flag Handle Torx Key, T15

Torx key in T15 on a flag handle. A flag handle is a flat tab set at right angles to the key, and it exists for one reason: it gives a grip that the fingers can actually turn, which an L key of this size does not. On small Torx sizes the limit is never the tool's strength but the operator's grip, so a flag handle is what makes repeated driving practical on assembly and service work. T15 is one of the common sizes on machine guarding, electronics enclosures and automotive trim.