BrassCraft Shut Off Valve: https://amzn.to/35962rb
This video will show you how to remove a 90 degree fitting from a copper pipe and install a compression water shut off valve. This example is in a bathroom sink base but the same install would apply in the kitchen sink base. Always smart to have shutoffs at each of your fixtures which will help with future repairs and possibly save damage from water if you spring a leak.

Supplies Used
Emery Cloth (Sandpaper): https://amzn.to/3jN9A6E

Tools Used
Mini Tube Cutter: https://amzn.to/2ZbMkr9
Channellock Pliers: https://amzn.to/3jRjOTG
Crescent Wrench: https://amzn.to/3562s1f

Tools Every Weekend Warrior Needs
Makita Corless Drill Combo Kit: https://amzn.to/2Jsw78j
Dewalt Drill Bit Set: https://amzn.to/2w0xAA4
Dewalt Screwdriver Bit Set: https://amzn.to/2UqTvK9
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Eklind Allen Wrench Set: https://amzn.to/2wKDu8M
Pliers (4-Piece Set): https://amzn.to/2JlYUM7
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Wire Strippers: https://amzn.to/2NHHKuS
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DISCLAIMER: This video and description contains affiliate links, which means that if you click on one of the product links, I’ll receive a small commission.