Calipers
Calipers are used to quickly and accurately measure the thicknesses of boards and workpieces. Mechanical and digital units available.
Verniers
For very precise measuring of any number of objects, verniers are used in almost every measuring application. From measuring board thicknesses to drill diameters and depths.
Squares
Set squares are used primarily for measuring the squareness of workpieces. Excellent for setting up of machinery like table saws and router tables.