Grips your moulding up to 3/4" thick Curtain rod bracket reaches around your moulding to fasten in place, so there's no drilling into your walls. No nails or hardware needed for most installations: Additional screw holes on the product let you secure with nails or screws (not included in package) if desired. Most settings require no drilling or hammering. Some moulding requires tapping bracket into position. Set of 8 no drill curtain rod brackets allows you to hang curtains on 4 windows. 8 metal instant standard curtain rod hooks work on wood moldings up to 3/4" thick