You are purchasing a Defender, Discovery 1 & Range Rover Classic Front Radius Arm Stainless Steel Fixing Kit
A4-80 is the equivalent of Mild Steel 8.8 high tensile bolts
Kits Consists of;
4no M16 A4-80 x 100mm Hex Head Bolts
8no M16 A4 Flat Washers
4no M16 A4-80 Nylon Nuts
2no M20 A4 Flat Washers
2no M20 A4-80 Nylon Nuts
You have all the fixing to fit;
Both front Radius Arms