A square format body plate for affixing to most Pro size SLR cameras, or cameras with an accessory battery pack.
 
The curve on the back of the camera is 1/2", roughly the same as Canadian or US dime.
 
Nikon Fit:
Nikon D1, D2H, D2X, D3, D3x series
Battery packs: MB-D10/D80/D200/D100, MB-40
 
Canon Fit:
EOS 1D/1Ds series
Battery Pack Fit: BG-E1/E3/E4/E5, etc. 
 
Includes:
5/32 Allen Key
1/4" LARGE head mounting screw
Hard anodized brushed finish
1/4" threaded accessory hole
 
Weight: 1.5oz(42 grams)
 
Dimensions 4.8cmx4.8cm (1-7/8"x1-7/8")