Package of four (4) 1/4-28 threaded pilot cutters in sizes: #40, #30, #21, and #12. 1/2" diameter. 1/4x28 thread. 3 flute, 100 degrees. Integral (fixed) pilot for cutting accuracy. High speed steel.
Specifications: 1/2" diameter (D) . 100° cutting angle (A) . 3-Flutes . 1/4-28NF thread (C) . Integral pilot