Imperial 82672 Aircraft Extension Drill Bits, 13/64" Mailbox Locks Interior diameter : 13/16"

Interior diameter : 13/16"

Frame Material: Aluminum

Cutting Width: 18"

You can turn rounding-over bits into beading bits

Imperial 82672 Aircraft Extension Drill Bits, 13/64" Mailbox Locks Interior diameter : 13/16"National Aerospace Standard 907 type B, type A243 specifications. Aircraft extension bits are used for drilling holes in hard to reach places because of their 12" length. The 135 split point eliminates the need for center punching. This drill bit will not "wander", not even on curved surfaces. Shanks are spring tempered to prevent bending. Highlights: Drill Size: 13 64" Overall Length: 6" Decimal Equivalent: 0. 2031" Shank Type: Spring Tempered