Oil Filter End Cap Wrench

oil filter
a filter that removes impurities from the oil used to lubricate an internal-combustion engine
An oil filter is a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil. Oil filters are used in many different types of hydraulic machinery.
A cartridge-filled canister placed in an engines lubricating system to strain dirt and abrasive materials out of the oil.

end cap
Package cushioning is used to help protect fragile items during shipment. It is common for a transport package to be dropped, kicked, and impacted: These events may produce potentially damaging shocks.
(End Caps) Symbols, such as an arrowhead or bullet, used to cap the end of a line of text.
(End Caps) These are plastic fittings used to close the end of a roof spa.

wrench
Pull or twist (someone or something) suddenly and violently
Injure (a part of the body) as a result of a sudden twisting movement
Turn (something, esp. a nut or bolt) with a wrench
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
a sharp strain on muscles or ligaments; "the wrench to his knee occurred as he fell"; "he was sidelined with a hamstring pull"