5 Pc Jumbo T-Handle Allen Wrench Set- METRIC Jumbo allen wrench set is heat treated extruded alloy steel, with black oxide finish for durability Allen wrenches T-handle design increases turning power and provides a sure comfortable grip Plastic-cote handles have size stamped on each allen wrench All wrenches in the set are from 9" to 11 1/2" in length Allen wrench sizes: 10mm, 12mm, 15mm, 19mm, 21mm