Everyone has some kind of 90-degree angle square in their shop, but Adam advocates for a specific kind of square: the 4” machinist’s square. They allow for fine and delicate layout on small parts, something a big honking 12” square will have trouble with. Adam has them in multiple sizes going down to 3/4” long (super tiny!) but if you had to have only one, get the 4”! Solid 4" Machinist Square: https://amzn.to/311GLLq Shot and edited by Norman Chan Disclaimer: Tested may earn an affiliate commission when you buy through the links here. Subscribe for more videos (and click the bell for notifications): null Twitter: http://www.twitter.com/testedcom Facebook: http://www.facebook.com/testedcom Instagram: https://www.instagram.com/testedcom/ Tested is: Adam Savage http://www.twitter.com/donttrythis Norman Chan http://www.twitter.com/nchan Simone Giertz http://www.twitter.com/simonegiertz Joey Fameli http://www.joeyfameli.com/ Gunther Kirsch https://guntherkirsch.com/ Ryan Kiser https://www.instagram.com/ryan.kiser Jen Schachter http://www.jenschachter.com/ Kishore Hari http://www.twitter.com/sciencequiche Sean Charlesworth http://www.twitter.com/cworthdynamics Jeremy Williams http://www.twitter.com/jerware Kayte Sabicer https://www.instagram.com/kaytesabicer Bill Doran https://twitter.com/chinbeard Ariel Waldman null Darrell Maloney http://www.twitter.com/thebrokennerd83 Kristen Lomasney https://twitter.com/krystynlo Intro bumper by Abe Dieckman Set design by Danica Johnson http://www.twitter.com/saysdanica Set build by Asa Hillis http://www.asahillis.com/ Thanks for watching! #AdamSavage #FavoriteTools