Fangrui Product Details Horizontally Adjustable: The Base Adapter Is Equipped With A Fine Adjustment Knob, Which Can Be Adjusted 360 Forward And Backward During Operation, Bringing Convenience To You Adjustable Height: The Laser Level Base Is Equipped With 3 Legs, And Workers Can Adjust The Height According To Their Own Needs. The Correct Height Can Help You Measure The Correct Information. Due To The 3 Legs, It Is Also Very Stable Thread Installation Design: The Level Tool For 1/4inch And 5/8inch Thread Installation Is Practical And Compatible With Most Laser Level Devices. On The One Hand, The 1/4inch Upper Is The External Thread Of The Laser Level, And On The Other Hand, The Bottom Of The 5/8inch Is The Internal Thread Of The Tripod High Quality Materials: The Laser Line Leveling Inst Ent Is Made Of Aluminum Alloy And Plastic, Which Can Prevent The Base Adapter From Rusting And Can Be Used For A Long Time; And The Aluminum Alloy Is Durable And Stable, So You Can Place A Heavy Tripod On The Adapter Widely Used: The Base Ada