Includes all 3 sizes of WAGO 221 LEVER-NUTS in a convenient plastic case that will fit in most pockets. They are sorted into compartments by size. Use them to connect any combination of solid, stranded, and flexible copper wires faster and more reliably. Includes: 16x 221-412 (2 conductor), 12x 221-413 (3 conductor), 8x 221-415 (5 conductor).