The StudSensor EDGE Zircon's most popular tool. Its ergonomic design features a body molded specifically to fit comfortably in the palm of your hand. The end result is a secure hold in either hand at any angle providing ease, comfort, and utility to the user. The EDGE also features a user-friendly interface SpotLite Pointing System which shines a bright arrow-shaped beam on the wall to clearly identify the edge of the target.