We uses good steel material to produce them, really great multi functional Tool for 3D Printer. It can be used For Creality all printers block and nozzles and MK8 MK10 V6 Nozzle Heater Block
Different opening mouth is used for different OD nozzle Size, Biggest opening mouth is suitable for all 20mm long heater block like MK8 V6 and Creality CR10 heater block