【Maximum Security with 4-Digit Combination】 With a huge range of 10,000 unique combinations, our 4-digit combination lock is 10 times more secure than traditional 3-digit locks. This makes hacking virtually impossible. Never worry about losing your keys again: our combination lock provides unparalleled security.【High-quality materials for long-lasting durability】 Made of high-quality zinc alloy and stainless steel, our combination lock is sturdy, durable and insensitive to rust and corrosion. The fixed stainless steel handle ensures a smooth surface, preventing water damage and rust. The thick zinc alloy lock body provides effective protection against cuts and impacts.【High-quality materials for long life】 Made of high-quality zinc alloy and stainless steel, our combination lock is sturdy , durable and insensitive to rust and corrosion. The fixed stainless steel handle ensures a smooth surface, preventing water damage and rust. The thick zinc alloy lock body provides effective