3 keys, 7, 8 and 9 mm, are supplied with the key.
Walnut size 7 - are e3d v6 + volcano nozzles
Walnut size 8 - are MK8 nozzles (Cr10, Ender, Anet printer, etc.)
Walnut size 9 - are nozzles MK10 (Flashforge)
1,8 Nm - for ruby nozzles, brass nozzles
2,5 Nm- for steel nozzles, brass nozzles