2Pcs Siding Gauge for Hardie Board Siding Tools for Hardie 5/16-Inch Features: and Fit for 5/16 inch thick siding board. Fit standard width fiber siding board. Adapt different siding situation, even on bowed wall. Works well for old/new fiber sidings and sidings. Fit for Hardie siding board. Adapt different siding planks sizes for 5-1/4" 6-1/4" 7-1/4" 8-1/4" 9-1/4" 12" Specifications: Stainless Steel Size:Approx.16x4cm/6.3x1.57inch Package Includes: 2Pcs Siding Tools note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.