A series of high-security mechanical lock cylinders based on spiral lock cylinders. All kinds of anti-theft locks (external door locks, mortise locks, door locks, car steering wheel locks, motorcycle anti-theft locks, safe locks, large padlocks, etc.) equipped with these high anti-theft performance lock cores are made of high quality imported materials. It is sturdy and durable, and it has strong anti-technical opening and anti-destructive (drilling, sawing, boring, shearing) ability, and has low mutual opening rate, good confidentiality and high safety performance. China Searun Solar Solution Co., Ltd. , https://www.searunsolar.com