The Johnson Adjustable Trivet Stand 40-6391 provides a stable platform for mounting the pipe lasers or other alignment devices on most surfaces. These surfaces may be a manhole, wall, or any other flat surface including the ground. This strong, durable trivet comes with a slope scale. And you can adjust its height for fitting into pipes of varying diameters. When the job is done, your trivet stores away easily for transport in the included soft-sided carrying case.