Only a small, heavy lock, and a place where a tiny key might fit.

Originally, a double set of five combined smaller locks were used.

Indeed, a small lock of it tumbled across his face.

The three of them crowded into the small, upright lock.

Most, if not all small locks can be prized off.

By the final volume, he has only a small lock of blond hair left.

But then the group reached the smaller, topside air lock.

A long string of thin wire was still hanging from the small lock.

He got into a little scout ship and was let out through a very small lock.

I would prefer a small lock because it's less weight to carry.