To compliment our medium size Whisker Poles (7-15 and smaller), Forespar^(R) designed the stainless steel PE-3SF & PE-3SC mast pad eyes. Measuring 2-3/4? x 2?, pad eyes have inside ring diameters of 1-5/8?. PE-3SF is for flat mast surfaces. PE-3SC is slightly bent to better accommodate a curved mast. Model PE-3SSF Description Flat base w/gusset