This pouch laser is strong yet light. A mechanical on/off switch and pendulum lock provide enhanced reliability. The LA-5P G has 5 easy to see bright and tight laser dots. When compared to traditional methods of 3-4-5 squaring, establishing short range square layouts with the LA-5P G is more effective. Builders with interior wall applications will appreciate that they can work directly against wood plates and metal track. The LA-5P G is great for positioning interior and partition walls up to 50ft and for transferring layout points from floor to ceiling.