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At each marked bracket location (where a stud was confirmed), use your power drill with a 3/16 inch drill bit to pre-drill a pilot hole into the center of the stud. Once the hole is pre-drilled, position the handrail bracket over the hole and use the supplied 1/4 inch screw to firmly attach the mounting bracket to the wall. Angle each bracket carefully to match the angle of the string line. If available, an angle finder app can help maintain consistency across all brackets. Repeat this pre-drilling and mounting step for all remaining handrail brackets along the intended run, ensuring they all maintain the same angle.