Concrete screw, Countersunk head. Torx 30 Hi-Low thread Flat point Harden Silver Ruspert 1500hours 7,5x72 10000pcs 7,5x92 10000pcs 7,5x112 10000 pcs Concrete screw, Hex washer head Hi-Low thread Flat point Harden Silver Ruspert 1500 hours 7,5x45 20000pcs 7,5x60 20000pcs