Single Brass Knuckles SFK 03 Stamp Black Anodizing Type 3

Dimensions:
Material - Aerospace Aluminum
Coating - Sand Blasting _ Type III Black Hard Anodizing
Height - 2 3/64" (52 mm) 
Width - 1 15/32" (37 mm) 
Thickness - 43/64" (17 mm) 
Finger hole diameter - 1" (25 mm) 
Weight - 1.9 oz (54 grams)