This square will work for most people. If you want a high accuracy square at 90 degrees, you should probably spend a lot more money on what the pros use for critical purposes. I only use it to tidy up my woodworking equipment. Don't worry about measurements in the 1/1000 inch range if I need to adjust the blade by loosening the screw to move it by hand.
Triangle Group TR918 225/45 R18 95V summer
61 Review
TV bracket Kromax DIX-18 black
52 Review
Kapro - 353 Professional Ledge-It Try & Mitre Square - For Leveling And Measuring - Features Stainless Steel Blade, Retractable Ledge, And Etched Ruler Markings - 12 Inch
23 Review
π Johnson Level and Tool 400EM-S 12-Inch Heavy Duty Metal Combination Square for Professionals, with Inch/Metric Measurements, Silver - 1 Square
8 Review
ICEPURE 2PACK Replacement for GE MWFINT, 197D6321P006, WFC1201, GSH25JSDDSS, PSHS6PGZBESS, SGF-G9, RWF1060 Refrigerator Water Filter - Efficient Filtering Solution for Your Fridge
22 Review
ICEPURE Plus 46-9690 NSF53 Certified Replacement For LG LT700P ADQ36006101, Kenmore Elite 9690 ADQ36006102, LFX28979ST, RWF1200A, LFX25978ST, LFXS30766S, LFXC24726S Refrigerator Water Filter,3PACK
41 Review
Laser Level, 98Ft Green Self-Leveling Laser Line With Magnetic Base, With Adjustable Lightness Line Cross Laser Level For Picture Hanging - KAIWEETS T03
18 Review
Precision Laser Level: Firecore 2X360 Self-Leveling Green Beam Tool With Pulse Mode And Rechargeable Battery For Accurate Alignment And Versatile Use
22 Review