Gets rid of bad ones, short and tall. Tightens when used, one size fits all.

Answer: noose

More Difficult Riddles with answers

More Difficult Riddles

Golden treasure I contain, Guarded by hundreds and thousands. Stored in a labyrinth where no man walks, Yet men come often to seize my gold. By smoke I am overcome and robbed, then left to build my treasure anew
Green arrows grow out of my sides. I go from yellow to white. My babies fly in the wind. What am I?
Halo of water, tongue of wood. Skin of stone, long I've stood. My fingers short reach to the sky. Inside my heart men live and die.
Hard to catch, easy to hold. Can't be seen, unless it's cold
Has feathers but can't fly. Rests on legs but can't walk.
Has no feet, but travels far. Is literate, but not a scholar. Has no mouth, yet clearly speaks.
He has married many women, but has never been married. Who is he?
He's dead with a metal bar across his back. When a woman sees him, she is very pleased. This was all perfectly legal. What's going on?
Held firmly in the hands, like a sword it cuts deep. Bloodless strokes, all, then forward we leap.
Hickory-Dickory-Dock! The mouse ran up the clock. The clock struck one and down did come. Hickory-Dickory-Dock! What am I?
His big belly supposedly has the ability to dispense good fortune.
Hold these between your knees if you want to set a Cuban beat.