Sleeved Wera Allen key for inch-sized internal hex screws to protect your fingers. This results in an ergonomic and comfortable grip even at low temperatures. The Hex Plus profile offers larger contact surfaces in the screw head. This minimizes the notching effect, nearly eliminating damage to the screw head. The ball end on the long arm allows for safe working even in difficult installation positions. The BlackLaser surface treatment provides excellent surface protection, including against corrosion, and ensures a long lifespan. Laser-etched and thus abrasion-resistant size markings on the Allen key for quick access.