This is a 10-piece Bondhus 13390 T-handle hex key set made of Protanium steel. The set includes sizes ranging from 3/32" to 3/8" and features a cushion grip and heavy-duty construction. The hex keys are designed for standard (SAE) measurements and come with a lifetime manufacturer warranty. Made in the United States, this set is colored yellow. Comes in a plastic case with hook and loop closure.