Quick and easy to install can be fitted in less than a minute with no special DIY skills or tools Fits all doors.The only universal design that is totally effective without hindering operation of all types of standard, rising and pivot hinge doors, even 180 degrees opening. 32, 000lbs of pressure, the guillotine effect of closing a door can cause serious injury.40, 000 accidents a year, the Governments estimate of the number of accidents requiring hospital treatment as a result of fingers trapped in doors Length 1940mm standard door height.Can also be used on fire doors without affecting ratings.