If I could give more than 5 stars I would.  I installed these at work on two doors that always would get the normal kick down doorstops broken.  These have been up a week and are working great.  There wasn't any instructions, but it was easy to figure out, If I could do it anyone could.  Install only took about 10 mins for the first then a little faster on the second.  Even slamming the door open these make it safe.  There is a spring in the little part that withstands damage.  I put the long part with the magnate on the door and the little part on the wall, I don't see any difference switching them.  I will be ordering more to out fit the whole building.  As a disclaimer, I did receive this product at a discount for my honest review.  I take writing this review very serious, and use the product before writing a review.  I take time to give the product a fair amount of use, to give the best review of the product I can.  The opinions in this review are my own and are no way influenced by receiving this product at a discount by the seller.  When I purchase items, I rely on honest reviews of the item.  If my review was helpful please click on "helpful" if it is.  Thank You.