Wood: #8 x 2-1/2″ coarse thread wood or drywall screw
Steel: #8, #10, or #12 x 1-5/8″ self tapping, fine thread, Type-S
Concrete: 3/16″ or 1/4″ x 2-1/4″ anchor screw (Tapcon)
Splicing Channel: 1/2″ pan head steel stud framing screw or similar
Use fasteners that will have a minimum of 120 lbs pull out or shear strength in the wood, steel, or concrete substrate. Tighten the fastener until it comes in to solid contact with the top washer on the GenieClip. For best acoustic results, do not over tighten.