This is a complete GM Heli Coil thread repair kit. It had never been used.
HELI-COIL Thread Repair Kit: 1"-8 Thread size, 5521-16
Helicoil Heli-Coil Thread Repair Kit 5/16-18 UNC 4131-5-1
HELI-COIL Thread Repair Kit: 3/4 -10, 5401-12
Heli‑Coil Thread Repair Kit 3/8‑16 UNC Tap Tool Inserts Preowned USA Complete
1/2-13 STI Coil Thread Repair Insert Tap Perma-Coil 1428-108 Fits Heli USA
7/16-20 NF Coil Thread Repair Inserts Pack of 6 Perma Coil 208-207 Fits Heli
