Knobs

noun

1. A rounded protuberance, especially one arising from a flat surface; a fleshy lump or caruncle.
2. A rounded control switch that can be turned on its axis, designed to be operated by the fingers.
3. A ball-shaped part of a handle, lever, etc., designed to be grabbed by the hand.
4. A rounded ornament on the hilt of an edged weapon; a pommel.
5. A prominent, rounded bump along a mountain ridge.