Professional nut sert tool for commercial or occasional use. Heavy duty nut sert tool, suitable for M3 – M8 nut sert fasteners. Ideal for steel and aluminium rivet nuts and suitable for use on most materials that cannot be tapped or welded. Requires access to only one side of the work piece. The nut can be installed after painting or other final finishing operations to provide a robust screw anchor, eliminating problems of welding and material distortion. Simple to use, requiring only one operation from one side. Provides strong thread with at least 6 thread turns, even when used on thin materials. Offers permanent and reliable fastening with soft grip handles for comfort and grip. Leaves a strong, professional-looking fastener and is suitable for inaccessible locations. SET INCLUDES THE FOLLOWING: 1 x nut riveting tool, 5 x mandrels (M3, M4, M5, M6, M8), M3 steel rivets / nut serts (20pc), M4 steel rivets / nut serts (20pc), M5 steel rivets / nut serts (20pc), M6 steel rivets / nut serts (10pc), M8 steel rivets / nut serts (10pc). Comes in a blow molded partitioned case for easy storage and transportation.