Related Clues:
- Cello parts
- Square ones won't fit into round holes
- Tent-securing spikes
- Square ones don't fit in round holes
- The Game of Life pieces
- Hat-hanging aids
- Lite-Brite bulbs, really
- Bass tuners
- Gets out in dodgeball, say
- Cello quartet
- Lite-Brite pieces
- Clothes holders on a clothesline
- Game pieces in Mastermind
- Features of stringed instruments
- Coats can be hung on them