Use: For metal profile types, up to a wall thickness of 2.0 mm, such as UA stiffening profiles for doors or for pre-wall elements, the special screw helps with its drill tip. The trumpet head ensures a secure hold and allows a flush finish without damaging the cardboard layer of the plasterboard. The drill tip allows direct screwing in without pre-drilling the screws into metal profiles up to 2.0 mm material thickness. The black phosphating provides temporary corrosion protection and ensures good adhesion of filler. The chemical reaction with plaster and the possible appearance of rust stains is prevented. The H force attack provides optimal power transmission and secure grip during processing. The SPAX GIX-D plasterboard screws are and comply with the requirements of DIN EN 14566 "Mechanical fasteners for plasterboard systems". Box contents: 1 SPAX box, pack of 1000 drywall screws, fully threaded, thread diameter (Ød1) = 3.5 mm x total length (Ls) = 35 mm, fully threaded length (LgV) = 29 mm, head diameter (Ødk): 8.3 mm, bit not included., Weight: 4.40924524 pounds, Manufacturer: Spax