Klein Tools 70552 Pro Folding Hex Key Set is a high-quality tool set designed for professionals. It contains 21 pieces, both in metric and standard measurements, made of chrome vanadium steel for durability. The set is neatly organized in a compact orange plastic case for easy storage and transportation.

The hex key set is 6.6 inches in length, 1.36 inches in width, and 2.15 inches in height, making it easy to handle and use in tight spaces. The Klein Tools 70552 Pro Folding Hex Key Set is a great addition to any toolbox and is perfect for mechanics, plumbers, and DIY enthusiasts.