Pallets travel on freight networks, not parcel networks. If you have only ever received parcels, almost everything about this is different.
A tractor-trailer, or a smaller box truck on some residential routes. The driver is there to move freight, not to carry goods inside for you, and they will not leave a pallet unattended.
A liftgate on a full trailer is slow, because every pallet goes down one at a time. Allow for that if you have bought a truckload.
Carriers call ahead to arrange a window on most residential and small commercial addresses. Someone has to be there. A missed delivery goes back to the terminal and redelivery costs time, and on some carriers money.
We process in 1 to 2 business days once payment clears, then transit takes 1 to 7 business days on the mainland, so 2 to 9 business days in total. Alaska and Hawaii take longer and depend on the sailing or flight that week, so ask us before you order and we will confirm.