Twinthread, phillips head with black phosphate finish for fast fixing of plasterboard to light shell or wood studs without pre-drilling. Please note, these items are priced individually and the correct price will be seen once the box quantity has been en Twinthread, phillips head with black phosphate finish for fast fixing of plasterboard to light shell or wood studs without pre-drilling. Please note, these items are priced individually and the correct price will be seen once the box quantity has been en