Easily attach FlexLatch with only one hand from either side The very simple flex action makes it so easy to latch or release the door from either side with just one hand Patented Its Strong FlexLatch pet door holder is built to withstand tough abuse from the ruffest dogs on the block Designed and packaged in the USA our nylon and stainlesssteel construction can deter the most determined pup Our onepiece design easily hooks onto most doorknobs and will safely hold the door protecting your cats private space from larger animals Its Strong FlexLatch pet door holder is built to withstand tough abuse from the ruffest dogs on the block FlexLatch wont ruin your paint and wont damage your home With easy access from either side of the door locked or not FlexLatch doesnt inhibit your movement whatsoever Because there is no cutting measuring double sided tape or screws to fumble with Our onepiece nylon design is reinforced with a stainlesssteel support which provides tremendous rigidity and durability With FlexLatch there is no measuring no adjusting no tools or doublesided tape Simply hang it from your doorknob and its ready to go