11 piece, inch ball-hex key set, includes: .050", 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32" & 1/4". Turns 360 degrees at up to 25 degree angle. Extra torque 8650 chrome nickel alloy. Heat treated for maximum strength. Black oxide finish to resist rust. Made in USA.