Kit Contains: Threaded Insert Tool x 1. Interchangeable Mandrels x 7: M3, M4, M5, M6, M8, M10 & M12. Multi-functional spanner x 1. Nutserts x 35 (5 of each size). Easily sets up to M12 Nutserts with more power and less effort than traditional Insert Tools. Creates a strong, permanent and reliable threaded fixing for use with bolts, studs and screws etc. Ideal for inserting threaded nuts into steel, aluminium, plastic and wood. Special rod structure between the handles makes it much easier to load and unload nutserts, saving time and effort in the workshop. Suitable for steel, stainless steel and aluminium nutserts. Steel body, Chrome Molybdenum alloy steel mandrels and reinforced 2mm heat treated Carbon steel handles for strength and durability. Ergonomic handles for extra comfort. Requires access to only one side of the workpiece so ideal for restricted spaces. Colour coded mandrels for easy selection.