Adjustable---The spacing of the adjustment holes is 0.63"" (16mm), and you can adjust the width of the door seam to suit the size of your pet according to your actual needs. No matter what kind of door frame, the door gap after using the product can be larger than 2.95"" (75mm). Multi-scene---Our door finger pinch guard are simple and efficient, and suitable for flat, curved or raised door frames. It can keep ventilated without pinching fingers and allow cats to get in and out of the room, but not for dogs. (dogs are larger than cats). Why it is Necessary---SAFELON door finger pinch guard is more convenient than using a pet door and can provide a peaceful space for your cat and dog. Our door finger pinch guard allows cats to enter the room as usual, but prevents dogs from entering and leaving the room or accidentally closing the door. Also prevent babies from locking themselves in the room; prevent toddlers from pinching their fingers. Multi-function---It can be used not only as a door stopper and a finger pinch guard, but also as a door restrictor. The door finger pinch guard consists of two parts: the lock hook and the lock lever. Made of PC material, the lock lever has strong elasticity and is not easy to deform or break. No Other Tools Required---Installation only relies on the strong stickiness of acrylic tape, no other tools or drilling is required. According to the test, SAFELON door finger clip guards can withstand 55 lbs of impact from the inside or the outside. Whether from the inside or outside of the door, it is easy for adults to operate the button to unlock with one hand.