This Seat Bolt mount truly requires no holes to drilled at all. The comes with a 4 holes amps plate that can be attached to the remote head bracket for your mobile radio. Please note you may have to drill a couple of holes in the remote head bracket to attach to the 4 hole amps plate on this mount. Some manufactures have incorporated the amps pattern in their brackets, in this case no drilling would be necessary. This mount is very easy to install. Just loosen the passenger seat bolt, slide the mount bracket under the bolt, tighten the bolt. The mount has a 22" Gooseneck Swivel Mounting Pedestal, this allows you to place your device in the perfect position for optimal viewing. This mounting solution does not require drilling. We do include additional hardware if you do want to permanently install the bracket, but it is not necessary.