2142340002 Features : Get increased strength with heads cast from durable silicon bronze and silver soldered strength Ensure secure placement with each nut’s slightly concaved face Know your placement is secure with the softer edges and a double reverse taper that resists rotating and rocking Always grab the right one to each size is color-coded with an alloy swage treatment; heads also have size identification on them Specifications : Range (mm) : 40 to 56 (1); 48 to 64 (2); 64 to 79 (3); 79 to 95 (4); 79 to 111 (5) Weight (g) : 4 (1); 7 (2); 10 (3); 13 (4); 15 (5) Strength (kN) : 2 (1); 3 (2); 5 (3); 6 (4); 6 (5)