Great Planes Brass Threaded Insert 8-32 (4) FEATURES: Brass construction. The perfect way to put threads into wood and mount engines to wood mounting rails. Threaded inserts make a simple & effective way to make wing hold downs. Can be used where blind nuts are hard to fit. Comes in a Parts-Pak clear plastic box with resealable lid. One year quality guarantee.;INCLUDES: (4) Threaded Inserts;REQUIRES: 7/32" Drill Size (package says 1/4" but that is too large). Epoxy (GPMR6042). Standard Slotted Screwdriver.