Snap On Wrench

snap on
Denoting a cover or attachment that is attached or secured with a snap
Before a team can throw (at the start of a game, after a break in play, etc) the throwing team or the 'judge', if you are using one, must indicate that the game is on by saying 'Snap-on'.
Snap-on is a leading U.S. designer, manufacturer and marketer of tools and equipment to professional tool users. It was founded in 1920. Snap-on is located in Kenosha, Wisconsin, and employs approximately 11,500 people worldwide. The company is currently worth 2.
Used to describe the easy removal of assembly of one part to another. A connector containing socket contacts into which a plug connector having male contacts is inserted.

wrench
a sharp strain on muscles or ligaments; "the wrench to his knee occurred as he fell"; "he was sidelined with a hamstring pull"
twist or pull violently or suddenly, especially so as to remove (something) from that to which it is attached or from where it originates; "wrench a window off its hinges"; "wrench oneself free from somebody's grip"; "a deep sigh was wrenched from his chest"
Injure (a part of the body) as a result of a sudden twisting movement
make a sudden twisting motion
Pull or twist (someone or something) suddenly and violently
Turn (something, esp. a nut or bolt) with a wrench