✔BOLT TYPE: fine/ UNF bolts; Head Style: Hex (1/2 wrench for 5/16-24; 9/16 wrench for 3/8-24; 5/8 wrench for 7/16-20; 3/4 wrench for 1/2-20)
✔THREAD DIAMETER: this bolts kit come with 4 series threads: 5/16-24, 3/8-24, 7/16-20, 1/2-20, whose thread diameters are respectively 5/16", 3/8", 7/16", 1/2"
✔11 VARIOUS SIZES: 5/16-24 series lengths 1", 1-1/2" and 2"; 3/8-24 series lengths1-1/4" and 1-1/2"; 7/16-20 series lengths1", 1-1/4", 1-1/2" and 2-1/2"; 1/2-20 series lengths 1" and 1-1/2"