CHQ series of German stand
Grade Qst32-3 / Cq15
Specification 5.5-42mm

Boron added CHQ series
Grade 10B21 / 10B28 / 10B33
Specification 5.5-42mm

International CHQ series
Grade ML08Al / ML35/ ML40Cr / ML20MnTiB / ML30CrMo / ML35CrMo
Specification 5.5-42mm

CHQ series of Japanese stand
Grade SWRCH6A / 8A / 10A / 15A /18A / 22A / 35K /40K / 45K / SCM435 / SCM440
Specification 5.5-42mm

CHQ series of Ameican stand
Grade SAE1018 / SAE1022
Specification 5.5-42mm