Chipboard screws,countersunk hexalobular head as in the enclosed pictures Material: stainless steel Aisi 410 (alternativeAisi 304) 4 x 35 20.000 pcs. 4.5 x 40 20.000 pcs. 4.5 x 45 30.000 pcs. 4.5 x 50 30.000 pcs. 4.5 x 60 20.000 pcs. 4.5 x 70 20.000 pcs.