Innovations in three-point pin designs have accelerated in recent years, as these devices are now available in more styles and materials than ever before. Most of the designs have been made to improve the compatibility and flexibility of three-point hitches found on the back of agricultural equipment. Three-point hitches provide linkage between the power take off, hydraulics, and hauling capabilities of tractors to compatible implements which can be used for everything from plowing, sowing, and harvesting to mowing, snow removal, and chemical spraying. G.L.HUYETT™ Snap Safety Pin, 2-Wire Imperial Square Handle, 1/4 in Pin Dia, 2-1/2 in Usable Length, 2-3/4 in Shank Length, Low Carbon Steel, Zinc Clear