Aircraft Tools New 1/4-28 Threaded Countersink Bit 1/2" Body x 100 deg

100 degree Countersink Fraction Sizes, 3/32, 1/8, 5/32, 3/16 & 1/4". All countersinks are made of high-speed steel, 3-fluted and 1/4"-28 threaded. 5 Piece Set Fraction 3/32, 1/8, 5/32, 3/16 & 1/4. 5 Piece Set Numbered #40, #30, #21, #10 & 1/4.

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