Machined from aircraft grade aluminum with hard anodizing finish. Comes with screws and hardware for installation. Installing this optic plate is NOT recommended for users that not familiar with pistol assembly. This optic plate requires removal the rear sight, dissemble the pistol slide to reach the screw hole underneath. Gunsmith experience is required. we recommend hiring a professional gunsmith. Please note. Unprofessional installation such as improper torque will result in screw loose, not holding zero, damage to the firearm/optic and personal injury.