The Delo Tekhniki 563591 key set is designed for efficient work with fasteners featuring a TORX internal profile. This set includes 9 L-keys with various sizes and reinforced working edges that help reduce the risk of fastener damage during tightening or loosening. The Delo Tekhniki 563591 key set is made of chrome vanadium steel, which features resistance to mechanical stress and a long service life. A durable plastic holder is included for organized storage of all items.