4 mm x 16 mm thread; Head Diameter: 6 mm; available size: 15 mm to 80 mm with 5 mm variation 6.5 mm x 16 mm thread; Head Diameter: 8 mm; available size: 25 mm to 100 mm with 5 mm variation 6.5 mm x 32 mm thread; Head Diameter: 8 mm; available size: 35 mm to 100 mm with 5 mm variation Drill bit of thread hole: 2.7 mm, 4.5 mm Pitch: 1.75 mm, 2.75 mm Hexagonal Socket: 2.5 mm, 3.5 mm Available in both Stainless Steel and Titanium