Although originally designed for concrete sink polishing, Da' Shaft can be used in almost any application including granite, marble, wood, and terrazzo. It uses a 5/8- to 11-in. thread backer pad that accommodates diamond pads as well as alternative finishing treatments such as leather, sandpaper, or felt. It provides an economical means for grinding tight spaces and hard to reach areas to expose aggregates and to achieve higher polishes with minimal effort. Concrete Countertop Specialties. 866-902-7311.