Set of two (2) spline-type (internal hex) wrenches specifically designed to install and remove Lycoming Narrow Deck (ND), IO-390 and IO-580 round cylinder nuts. Sizes are 1/2" and 3/8" and both have a 1/2" square drive.
1/2" Internal Nut Wrench with 1/2" square drive. This wrench is designed specifically to install and remove Lycoming Narrow Deck (ND), IO-390, and IO-580 internal wrenching nuts.
3/8" Internal Nut Wrench with 1/2" square drive. This wrench is designed specifically to install and remove Lycoming Narrow Deck (ND), IO-390, and IO-580 internal wrenching nuts.