#31 (0.1200), Cobalt, 135 degree split point, jobbers length. Overall length 2-3/4". Pack of 12 each.

Drill bit features a radial concave flute with a Speedpoint™ tip. Sizes are laser marked on the drill bit. Bit has increments in measurements for 1/2" and 3/4" KO.

#21 Diameter 6" long Aircraft Extension Drill Bit. Made of high speed steel.

1/2" (0.5000), 135 degree split point. High speed steel. 12" Aircraft Extension series

13/32" (0.4063), 135 degree split point. High speed steel. 12" Aircraft Extension series

#21 (0.1590), 135 degree split point. High speed steel. 12" Aircraft Extension series

Drill 13 hole sizes with just 3 bits.

#16 (0.1770") Diameter. Working length: 1" Overall length: 1-1/2". 1/4-28 thread. Made of extra durable Cobalt Steel.

5/32" (0.1563) diameter, 2" Flute Length. Zero-degree rake, a 90-degree point, and parabolic cutting flutes to drill through Plexiglas, and acrylic plastics without binding or "breaking out."

#41 (0.0960), Cobalt, 135 degree split point, jobbers length. Overall length 2-1/2". Pack of 12 each.

3/8" (0.3750), Cobalt, 135 degree split point, jobbers length. Overall length 5". Pack of 6 each.

U (0.3680), Cobalt, 135 degree split point. Overall length 5"