Form keyhole slots in plaques, picture frames, and other Wall-Hanging items with this plunge-cutting bit. Plunge to form the entry, then advance the router to cut a short T-Slot. Use in a handheld plunge router, #45652, diameter (D) 1/2, cutting height (B) 3/8, shank (D) 1/4, overall length (L) 1-1/2, B1 3/16, flutes 1, D1 5/16, 45652 carbide Tipped keyhole 1/2 dia x 3/8 x 1/4 inch shank