The hexagonal Staking-Block For Clock Repair is very useful when working with a variety of clocks. It has various hole sizes, which can accommodate a wide variety of sizes in winding arbors. It is also great for many other purposes as well. You will always find the perfect fit for any size arbor. By utilizing the correct size, it allows the arbor to be held in place in order to stake a wheel. The block is 2 inches wide and 3/4 inch deep.