Feature: Instant template for marking precise ceramic tile cutting No rust plastic confirms to shape and holds the pattern Item type: Profile Gauge Material: ABS plastic Color: Green Condition: 100% new Metric and imperial marked gauges two kind of size: 12CM: 5.7 x 4.1 x 1 inch 25CM: 10.5 x 4.1 x 1 inch How To Use The Contour Gauge ? Step 1. Prepare the contour gauge and the tools you need. Step 2. Use the contour gauge to measure the profile of the corner. Step 3. Just marker the contour on the carpet or tile and cut into the trace. Step 4. Then the carpet or tile will completely match the contour of the corner.