Drywall screws:

Features: Coarse thread, Fine thread

Raw material: Carbon steel 1022

Head type: Bugle head

The size : 3.5*16-4.8*152; #6*

Finish:Hardened,Z.P,Black Phosphated,Grey Phosphated

Driver:Phillips,Pozi,Square,Torx recess

Chipboard screws

Features: Coarse thread, Fine thread, With or without rid

Raw material: Carbon steel 1022

Head type: Countersunk head or Flat head, Pan head, Oval head

Diameter: 3.0mm-6.0mm

Length: 10mm-200mm

Finish: Hardened,Z.P,Black Phosphated

Self-drilling screws

Raw material: Carbon steel 1022

Head type: Modified trussed, bugle head, pan framing head

Driver: Phillips, Pozi,Square,Torx recess

Diameter: 3.5mm-4.8mm

Length: 10mm-200mm

Finish: Hardened,Z.P,,Black Phosphated,Grey Phosphated