Robbox Length Extension is a box beam level extension designed to expand the working length of your Sennses Pro Device. The extension is precision-machined on three surfaces and features magnetic removable end caps. The Sennses Pro measuring device snaps in place securely with a magnetic latching system.

The top surface is uninterrupted for easy marking, and features an imperial scale. A metric scale can be found on the bottom. Two precision calibrated bubble vials for level and plumb are incorporated for use without the Sennses Pro digital measuring device for added versatility. 

Includes carrying bag for safe handling and storage.

Features

• Three-Surface Machined Aluminum Body for Ultimate Precision
• Removable Magnetic End Caps
• Three-Way Calibrated Bubble Vials for Added Versatility
• Magnetic Latching System with Optional Thumbscrew
• Easy-Grip Rubber Handles