Features and Benefits:Radius V-Groove design creates an anti-slip and prevents rounding of the fastener.;Box end is offset by 15 degrees to provide clearance for your fingers and other obstructions near the fastener.;Fully polished to eliminate oil and grease build up.;Radius Corners to grip the flat sides of the fastener head instead of the corner to prevent round-off.;Chamfered box end allows for fast and easy guidance onto fasteners. ;Set comes with a durable canvas pouch for easy storage and transportation.;Upgraded steel from High Carbon to Chrome Vanadium for more strength and durability.