binding screw

13 LETTERS · STARTS WITH B

binding screw is a valid 13-letter word worth 21 points in Scrabble and 26 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3I1N1D2I1N1G2S1C3R1E1W4

3 + 1 + 1 + 2 + 1 + 1 + 2 + 0 + 1 + 3 + 1 + 1 + 4 =21 PTS

DOUBLE WORD → 42TRIPLE WORD → 63

MEANING

What does binding screw mean?