A heavy-duty aluminum I-beam frame provides the foundation of strength for this 48" level. The I-beam is then inlaid with the finest selection of mahogany wood for a strong, yet beautiful finish. Six Cat's Eye Yellow double bent vials are solid set for accuracy. Double bent vials make leveling easier. The vials feature permanent lines that won't fade or wear away. The level is guaranteed accurate to .0004" per inch. The vials are protected by glass lenses to extend the life of the level. Shock absorbing rubber end caps are secured end level to stand up to wear and tear on the tool. Two large hand holes provide comfort and ease when moving the level. A hang hole on one end allows for easy storage when not in use. A popular level for masons. Proudly made in the USA. 6 Vial Mahogany I-Beam Level A heavy-duty aluminum I-beam frame provides the foundation of strength for this 48" level. The I-beam is then inlaid with the finest selection of mahogany wood for a strong, yet beautiful finish. Six Cat's Eye Yellow double bent vials are solid set for accuracy. Double bent vials make leveling easier. The vials feature permanent lines that won't fade or wear away. The level is guaranteed accurate to .0004" per inch. The vials are protected by glass lenses to extend the life of the level. Shock absorbing rubber end caps are secured end level to stand up to wear and tear on the tool. Two large hand holes provide comfort and ease when moving the level. A hang hole on one end allows for easy storage when not in use. A popular level for masons. Proudly made in the USA.