High quality, industrial grade professional tool made with Eklind alloy steel. Heat treated for optimum strength and durability. Finished with Eklind black finish to resist rust. Fold up sets include a variety of popular sizes in one convenient handle to keep you from losing keys. Fold a key out to a right angle to get maximum leverage; fold a key out completely to operate like a screwdriver This fold up hex key set includes sizes: 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4". Comes in a hard plastic shell that is stronger than steel and a soft plastic over mold for comfort and slip resistance to enhance your safety. The ergonomic shape fits comfortable in your hand. Made in the U.S.A.