You are purchasing a Defender, Discovery 1 & Range Rover Classic Front or Rear Spring Retainer Fixing Kit
A4-80 is the equivalent of Mild Steel 8.8 high tensile bolts
Kits Consists of;
4no M10 A4-80 x 30mm Hex Head Bolts
16no M10 A4 Flat Washers
4no M10 A4-80 Nylon Nuts

You will require 2 kits for Front & Rear