General description AlwaysH Set of 10 open-end wrench heads is designed for use with extension handles and 3/8" ratchet wrenches, providing better reach and versatility for various tasks. Made from high-quality drop-forged, quenched, and tempered 45 steel, these wrench heads feature a fully polished finish for durability and ease of use. Technical specifications Material: Drop-forged, quenched and tempered 45 steel Finish: Fully polished Sizes: 10 mm to 19 mm