Digital caliper.  THREE MEASURING MODES: Higher quality lower price stainless steel digital caliper with inch/metric/fraction conversion.  PRECISION | ACCURACY: Measurement Range: 0 – 6″ and 0 – 150mm; Resolution: 0.0005″ / 1/128″ / 0.01mm; Accuracy: 0.001″ / 0.02mm.  STAINLESS STEEL: Hardened stainless steel shaft with depth-measurement blade, precise internal and external measuring jaws , precision lapping finish electronic digital calipers

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

UBANTE Quality Electronic Digital Caliper Inch/Metric/Fractions Conversion 0-6 Inch/150 mm Stainless Steel Body Orange/Black Extra Large LCD Screen Auto Off Featured Measuring Tool

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

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OxiClean Free Versatile Stain Remover Powder, 3 lb

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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

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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 -$1.87 $30.58

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.

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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

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

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