Get the same great feel in every ball you own with Switch Grip Interchangeable Inserts. This revolutionary two-piece insert assembly allows bowlers to remove and interchange thumb inserts from one ball to another for the same fit and feel every shot. No Turbo 2-N-1 Grips announces NEW and improved "Big Tabs" to it"s popular interchangeable thumb insert, Switch Grip. Turbo 2-N-1 Grips is committed to producing only the highest quality products. We continually strive to improve our products to satisfy the The overall strength and durability of Switch Grip also depends on proper installation. Pro shops please be sure to follow the instructions outlined in our instructional video and brochure for best results. Turbo 2-N-1 Grips guarantees our products free f