Collets and accessories hold small-diameter cutting tools or workpieces on a milling machine, lathe, or other machine tool. Collets fit snugly into collet chucks or machine spindles to grip round, square, or hex-shaped cutting tools, such as end mills and bits. Collet nuts secure the collet to the machine spindle. Collet wrenches tighten and loosen collet nuts. Collet coolant seals fit coolant-through collets to prevent leaks. Collet storage keeps collets organized for quick access.