This Robart Manufacturing RC Airplane Steel Pin Hinge Point is an upgrade you can't live without. It is essential for the smooth functioning of your RC airplane. These hinge points come in a pack of 15 and are made of steel to ensure durability. They are designed to fit perfectly on SIG, Hangar 9, Robart, and Great Planes. The hinge points are compatible with a wide range of fuels and scales, including gasoline, electric, nitro & glow fuel, and jet fuel/kerosene. The hinge points are 1/8 inch in size and come in gray. The hinge points are easy to use and require no modification.