Watch Springs

"The spring is useless in the watch, but reveals a secret when placed correctly"

W H S D E L K W I
I I T D C Y E A N
T M O N A T N T G
H P P O N H G C V
O E P W N E R H E
U R E T O B E S X
T I D I T R E P E
W T A M F O N R S

<spoiler> Answer is the loops in the spring, five Actually, the spring snaps to the grid. When it does, it crosses through the center of letters which spell out "How Many Waves?" To which the answer is five.</spoiler>