Thread Repair Kits 30 x 3.5 V-COIL Volkel 04054.

Application:
Thread Repair of damaged or worn-out threads
1x STI-Taps, set of 2 pcs., HSS-G
10x Wire thread inserts 
1x Inserting tool with Hexagon Drive
Material Wire Thread Inserts frostainless steel.
Packing in metal case.