Restore and repair damaged threads with this Draper metric thread repair master kit The Draper 21690 is an expert quality, comprehensive kit for repairs and restoration of damaged threads to their original size and condition. The high-quality stainless steel thread inserts provide stronger assemblies where there is a tapped hole. The inserts can be easily placed using the patented magnetic insert bit holder.  Features: High-quality stainless steel thread inserts provide stronger assemblies where there is a tapped hole  The inserts can be easily placed using the patented magnetic insert bit holder  Packed in blow mould case with display sleeve Contains 5 x HSS twist drills: 5.5, 6.3, 8.3, 10.4, 12.4mm 5 x HSS second taps5 x tang breaking tools 1 x Interchangeable insert winder handle 5 x 1/4\" hex. x magnetic screw insert drivers 1 x 2mm hexagon key24 x Thread inserts: M 5 x 0.815 x Thread inserts: M6 x 1.0 10 x Thread inserts: M8 x 1.25 6 x Thread inserts: M10 x 1.5 5 x Thread inserts: M12 x 1.75