Really sell your advertising campaign with the help of this Mortgage Pen with Patented PDAPoint™ ! Use this innovative patented pen to easily calculate one's monthly mortgage payment. It's great for real estate agents, sales people, finance companies and banks. It measures 5 1/4" x 1/2" diameter and is available in three impressive product colors. Not compatible with touch point devices. Add your company information to extend your brand's reach with ease. Patented: 5,913,629; 6,050,735; 7,033,102 & D529,089.