Push Pins Without Leaving a Mark
by Steve Levenstein
Push Pins gives the humble push pin a much-needed makeover. Your walls (and your landlords) will thank you!
With Push Pins industrial designers have succeeded in improving the proverbial mousetrap, if not reinventing it. This time it's the humble push pin, known to one and all as a handy dandy sticker upper for photos, posters and anything with a loop.
Unfortunately, landlords get thrown for a loop when they give your rental apartment a final inspection and find more holes than a wheel of Swiss cheese (so THAT's where I put it!).
Since renters are responsible for damage caused to their temporary abodes, dozens or hundreds of holes-tiny though they may be-could cost you big time.
Not so with the Push Pins. Someone, somehow figured out that if the point of the pin is angled a certain way, a small clod of material is retracted when the pin is pulled out of the wall. With the hole filled to at least some degree, your walls will look pristine and your superintendent (or spouse) won't "pin" the damages on you.
Sources from: http://inventorspot.com/articles/ninjapin_stabs_without_leaving_mark_26001
