New four-wheel combination lock: • A solid, high-functional “made in Germany” combination lock. • Very high security due to its 10,000 possible number combinations and free wheeling feature when in locked position. • Free wheeling, patent pending. • Code can be changed easily by user. • The lock has a service cylinder with 4,000 possible different key numbers for code finding and opening. • The lock can be switched to fit doors with hinges on the left or right hand side. • “Soft-touch” knob lacquered for pleasant tactile handling, scratch-resistant stainless steel lock plate. • Raised combination dials can be read from any position.