Electronic Digital Caliper by Neiko.  Easy to operate.  One button switches between inches and mm.  Hardened stainless steel shaft.  Resolution: 0.01mm/0.0005 inch, Accuracy: 0.02mm/0.001 inch.  Large LCD display.  Take measurements from 0 to 6 inches.  1 year warranty.

I use calipers around my home brewery to… measure things. 🙂  Including… fitting sizes, o-ring sizes [See: Bulk Keg Orings and Keg Repair Part Numbers]

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for current description, price and availability.  Also: Today’s Deals on Amazon

Neiko 01407A Electronic Digital Caliper with Extra-Large LCD Screen, 0-6 Inches

Also: Nut & Bolt Thread Checker (Inch & Metric) – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link

This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!

OxiClean Free Versatile Stain Remover Powder, 3 lb

$8.29 ($0.13 / load)

Vacuum Sealer Machine with 55 Count 8"x12" Food Sealers Bags and 8"*79' Vacuum Sealer Roll, Inkbird Automatic Vacuum Sealers Machine with Built-in Cutter, Dry & Moist Sealing Modes for Food Storage

$65.99

Gamma2 Vittles Vault Airtight Dog Food Storage Container - Fits up to 35 Pounds of Dry Pet Food - Perfect for Cat and Puppy Kibble - BPA-Free Plastic - Made in the USA - 12" L x 16.75" H

$32.45 -$7.06 $25.39

FLOTit 2.0 - No Beer Left Behind Floating Dip Tube with Double Filter Inlet (DFI) of 500/300 micron for always clear beer, less beer waste and no clogging. Made in USA.

$29.00

Meat Thermometer Digital for Grilling and Cooking - ANDAXIN Waterproof Ultra-Fast Instant Read Food thermometers with Backlight & Calibration for Kitchen, Deep Fry, BBQ, Grill(Red/Black), LCD

$6.99

VEVOR Magnetic Stirrer, 0-2000 RPM Stir Plate with Adjustable Speed Knob, 3000mL Plate Stirrer Kit, Stir Bar Included

$16.84