TECHNICAL SPECIFICATION: Heavy Duty, Made of selected tubing, Chrome plated, Conforming to IS 2030-1989. Tubular Box spanner - also known as tube spanner / box spanner, is a two sided Chrome plated Spanner used to provide grip and mechanical advantage in applying torque to turn objects, usually rotary fasteners, such as nuts and bolts to tighten or loosen them. The De Neers tubular Box Spanners are used in all the industries, garages and homes to tighten or loosen the fasteners. If you are looking for the best set of spanners then log on to www.samsindusneeds.com and book your De Neers Tubular Box Spanner of any metric size, online. De Neers understands the customer needs better than any other brand and manufactures quality products. HSN CODE: 82041110.