Designed by Dr. Tucker for his gold finishing technique. Two kits are available. The combo kit offers 1/2" regular brass center discs and 3/8" mini brass center discs. The mini kit features 1/2" and 3/8" mini brass center discs. Grits in both kits are: garnet medium, sand fine and cuttle fine. Refills of 100 discs per tube are available.