SNAP n.
flask (Molding), a flask for small work, having its sides separable and held together by latches, so that the flask may be removed from around the sand mold. -- Snap judgment, a judgment formed on the instant without deliberation. -- Snap lock, a lock shutting with a catch or snap. -- Snap riveting, riveting in whi…
TUMBLER n.
A movable obstruction in a lock, consisting of a lever, latch, wheel, slide, or the like, which must be adjusted to a particular position by a key or other means before the bolt can be thrown in locking or unlocking.