Counterbore with a slow spiral drill fitted. Tungsten Carbide Tipped for use in abrasive materials.

Specifications:

D1 3/16 inch
D1 4.75 mm
D2 1/2 inch
D2 12.7 mm
Shank Diameter 1/4 inch.

Pack Quantity: 1
Height: 15
Length: 150
Width: 80

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