Features:1. Chrome vanadium steel forging: The product is forged by chrome vanadium steel, which is durable and wear-resistant.2. Overall heat treatment: Overall induction hardening, increase product hardness and prolong service life.3. General hexagon handle: The handle diameter is 6.35MM (1/4 inch), which is a standard hexagon handle.4. Easy installation: There is no need for other tools to install the product, just takes a short time to finish the installation. 5. Safety: Made of safe materials, environmentally friendly, non-toxic, tasteless, and harmless to humans.Description:The Hexagon handle screw socket wrenchs are forged by chrome vanadium steel, durable and wear-resistant.Specifications:Material: chrome vanadium steel forgingDiameter (mm): 3/16, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16, 5, 5.5, 6, 7, 8, 10, 12 OR 5, 6, 7, 8, 9, 10, 11, 12, 13 (optional)Uses: screw tightening, dovetail screws, etc.Package Included:9 pcs * hexagon handle screw socket wrenchs14 pcs * hexagon handle screw socket wrenchs(optional)