Heavy duty construction made to Type J aircraft specifications

1 7/16 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank)

#34 Heavy Duty Drill Bit - Stubby Length

3/4-16 x 6 Hex Cap Screw SS 18-8 (A2)

47/64 x 6 Reduced Shank Drill Bit Cobalt (1/2 Shank) Jobber Drill Bits - Wire Gauge Heavy duty construction made to47 64 x 6 Reduced Shank Drill Bit Cobalt (1 2 Shank) . Expands the size range capacity of a 1 2 inch portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.