HSS Single Flute Countersink 1.25" Enables burr-free deburring and countersinking. Eliminates deburring and countersinking problems on aluminum, brass, bronze, plastics, rubber, soft steels, wood and other materials. Features include... Size: 1.25" Shank Diameter: 3/4" Overall Length: 2-3/4" Available in 60°, 82°, 90°, & 100°. 90° Countersink has 1/2" Shank Diameter 100° Countersink has 1/2" Shank Diameter & 3 3/8" Overall Length Please select angle when adding to your cart.