If you"ve been working hard with your Pogo Sketch Pro or have been a little forgetful having a backup set of tips is a good thing to keep on hand. 2 tips per package that simply screw into your Pogo Sketch Pro.Ten One Design LLC is a design firm based in Montclair NJ specializing in solutions for the mobile lifestyle. Features Accommodates every artistic style Solid unibody aluminum construction A mighty new patent pending Pro Tip Smooth responsive writing on iPad and other tablets