Ring Holder with Half Engraver's Block:

Model NO:HJ-A21

Specifications

Ring Holder with Half Engraver's Block

With 7 pieces ring setting sleeves, platform and Tapered screw set.

Specifications:

Net Weight: 1.44kg, 
Gross Weight: 1.50kg,
Ball dia: 83mm, 
Ball height: 55mm, 
Rubber base dia: 75mm, 
Rubber base height: 32mm. 
Overall dimensions: 83*83*93mm.