Thank you for viewing. This is a replacement knob for a Mul-T-Lock. It is a highly secure lock. I became interested and studied at a locksmith school, and during that time, I learned from the instructor that this lock is almost impossible to pick. If forced open, it will basically be broken. It would involve using tools like a drill to make a hole and unlock it from the inside. I bought it thinking of installing it on a garage door, but I ended up replacing the entire door, so I no longer need it. The box is crushed and damaged, but the contents are unused. Because of the box damage, I marked it as "Like New." MUL-T-LOCK KIK Replacement Knob Door Thickness 25-43mm, Includes 1 Owner Card and 3 Keys Compatible with MIWA HM / MIWA HBZ / GOAL UC/GF type knobs. For more details, please search online, and you will find information on compatible replacements. Thank you for your consideration.