Snap On Open End Wrench

open end
(open-ended) without fixed limits or restrictions; "an open-ended discussion"
The David Susskind Show was an American television talk show hosted by David Susskind. The program began its existence in 1958 as Open End, and was broadcast by WNTA-TV (now WNET) in New York City.
(Open ended) An open-end(ed) fund is a collective investment scheme which can issue and redeem shares at any time. An investor will generally purchase shares in the fund directly from the fund itself rather than from the existing shareholders.

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.
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'.

wrench
Turn (something, esp. a nut or bolt) with a wrench
Pull or twist (someone or something) suddenly and violently
Injure (a part of the body) as a result of a sudden twisting movement
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"
make a sudden twisting motion