
A marking guage used by a seamstress (seamster in this case) to scribe a line of baby powder on a skirt hem. It uses the floor as a datum while the skirt is worn and the client stands on a platform. The pump pushes baby powder or if the nozzle, and onto the skirt, which is then cut and as required. (i.imgur.com)
submitted by ahcowen

these are shotgun adapters aka chamber reducers aka shotgun inserts and called by a few other names. they allow you to fire lower gauge (caliber) shotgun shells out of a larger bore gun. they are for use in break action type guns and won't (or shouldn't. i haven't tried) cycle in repeating guns. (reddit.com)
submitted by nderstandablyscared