Overview Reviews Product Description The Irwin extendable level is constructed with three heavy-duty aluminum i-beam rails.Extendable from 5'-13', 10", the three rail design is ideal for plate leveling and is guaranteed accurate to 0.58° for life.Made in the u.s.a. Irwin Tools Catalog Product Videos Custom Field Manufacturing country US Product Reviews Write a Review Write a Review × Irwin 60 - 156" Extendable Level 1801107 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *