Details: Drywall Screws Ideal for plasterboard,fiberboard and other insulation boards where these boards need to be fastened to wood or steel partitions. Used extensively in the partitioning and suspended ceiling industry. According to the difference of the thread, drywall screws are be divided to drywall screws fine thread and coarse thread. Fine thread: for fixing plasterboard to metal studs Coarse thread: for fixing plasterboard to timber studs. Drywall Screws Coarse thread PRODUCT RANGE: Diameter: 3.5mm(#6),3.9mm(#7),4.2mm(#8),4.8mm(#10) Length: From 16mm to 152mm Or From 1/2" to 6" APPLICATION: Designed for fixing plasterboard to timber studs up to 1mm. PRODUCT FEATURE & BENEFITS: 1.Manufactured from C 1022 or SWRCH22A grade steel-premium quality. 2.Super sharp point dimples steel at point of contact providing wobble-free and therefore quicker installation 3.Bugle head design for application versatility gives a flush countersink with no paper tearing. 4.Thread configuration ensures clean, smooth, low torque installation for maximum holding power. 5.Deep Phillips recess reduces dropped or misaligned screws, providing fast and efficient fastening. Coating: Black Phosphated,Grey Phosphated,Zinc,Yellow Zinc,Decromet Packing: Bulk packing,small boxes packing,all kinds of DIY packing.