1. double-ended pin Basically a long pin, small nail or tack that has the end snipped off with a pair of good strong wire cutters. This simple little idea works best in cases where the artwork/item is too small for the conventional combination of fittings, or if the item must sit as flat to the wall as possible. Ideal for those little regional photos on MDF. Also very useful for small 'Artmount' blocks. Application: Simply nail the pin into the substrate (wall or item), whichever is of the greater density, then press slowly but firmly into position all the while being extra careful not to over-force. Over-forcing will buckle the pins and fracture the weaker substrate, you'll be left with a crooked image - flat against the wall - but crooked (a word of caution is necessary to a client with little children, very sharp pins are exposed either from the wall or the rear of the artwork/item should the said item be dislodged or removed from the wall). 2. twin pins (picture hooks & screweyes) Very possibly the single most under-rated picture hanging system ever. The conventional picture hook and matching sized screw eye is the solution for eight out of ten items. The key to this humble partnership is, no string. Not wanting to labour the point, but hooks and eyes used without string will ensure the safest installation of artwork/items. Application: Screw-eyes should be affixed as high as possible to the back at each side of item