Contour Crates wire dog crates provide a personal, den-like space for dogs and are useful for housebreaking, puppy training, and travel. The safety and security of the slide-bolt latch combines with the exclusive LapLock Technology, which creates multiple lock points around the door. The easy-to-in.stall divider panel can be used to adjust the living space for a puppy. Contour Crates comein. Single- and double-door options with seven sizes for toy breeds to extra-large breeds.