The Combi-Bolt is a traditional sliding bolt, but it has a 4-dial, 10,000 number possible combination lock for keyless security. I used to have a Hasp and padlock on my backyard shed and had to cut the padlock off more than once because one of my kids lost the key. I’ve now had this lock on my shed for over a year and I love it. I keep my garden tools, the dog toys, basketballs and even a spare house key in my shed, and I no longer have to worry about my kids losing yet another key or myself having to destroy another padlock! Everyone has access when they need it and if for some reason I want to change the combination, it’s easy to do. It’s constructed of solid metal and has held up well over our snowy, rainy, windy winter and works just as well as it did the day I installed it. It also came with “one way” screws so that once it’s installed, you’d have a tough time getting them out (luckily I positioned it correctly the first time). You can even use this lock as a child safety device to keep the kids out of the cupboards in your home or workshop.