-Reamed head -In hardened zinc-plated steel with anti-friction coating -Set of 350 pieces -160 pieces of 3.5 x 35 mm -100 pieces of 4.0 x 30 mm -60 pieces of 4.5 x 40 mm -30 pieces of 5.0 x 50 mm -Countersunk head, T recess -T15/T20/T25