Just received the new Spider Hand Strap. The most comfortable hand strap available to date. I got the basic black, however, other colors will be available soon.
Fits with most camera brackets. I'm using it with the L brackets by ProMedia Gear.
One is installed on my D600 the other my D800. Also can be used with the Black Rapid strap. All the attachments necessary come with the unit. Gives you a secure hold on your DSLR without restricting the cameras controls. Easy installation and completely adjustable for position and Hand size.