EKL20519 Features: -High quality, industrial grade, professional set.-Made with Eklind® Alloy Steel.-Heat treated for optimum strength and ductility.-Eklind® ball-hex keys will drive a fastener at up to a 30 degree angle Sizes include: 3/16", 7/32", 1/4", 5/16" and 3/8". Fold up sets include a variety of popular sizes in one convenient handle to keep you from losing individual keys. Fold a key out to a right angle to get maximum leverage. Fold a key out completely to operate like a screwdriver. Eklind® Classic steel fold-up sets are compact to fit most easily in your pocket. Made in the U.S.A..-5 Piece SAE Ball End Fold Up Hex Key Set. Color/Finish: -Finished with Eklind® Black Finish to resist rust. Warranty: -Lifetime warranty does not cover abuse.