Answer
Jul 20, 2026 - 05:59 AM
A keyhole slot should typically be about 1/4 inch (6 mm) deep to securely hold the mounting hardware, such as screws or nails. This depth allows the hardware to slide in and lock firmly without compromising the strength of the material. Always ensure the slot is deep enough for the hardware head to fit fully inside. Nothing is worst than to have a customer bring back a job because it fell off their wall , that will lead to no referrals and word of mouth bad comments.
