Busch Fig. 231F/231FL/231FXL 2.3 mm x 0.20, 0.30 & 0.40mm Carbide Circular Cutters Durston the IR-310 twist type

the IR-310 twist type

it does not factor into clarity grading

Works with the Otto Frei Super Economy Rolling Mill and select Economy mill models

Machine-made to ultra-high precision tolerances — no chatter or drag

8mm 41-94 14K White 2

Busch Fig. 231F/231FL/231FXL 2.3 mm x 0.20, 0.30 & 0.40mm Carbide Circular Cutters Durston the IR-310 twist typeBusch Fig. 231F, 231FL, and 231FXL carbide circular cutters are precision tools designed for the second step of pav setting in hard metals. After drilling starter holes with a carbide twist drill, these circular cutters enlarge each hole to create a secure seat for the rondiste of the stone being set. The smallest 0. 40 mm diameter is especially suited for cutting in tight corner areas and fine refinishing work. Carbide burs offer the longest service