Matty's Toy Stop Deluxe Solid Wood Domino Trays (4 Count) Game Bundle - 2 Pack (8 Trays Total)

Do these racks have non slip bottom?

Would these work for scrabble tiles?

Are the slots wide enough for the thicker dominos to fit in without forcing them in the slot. Some racks will not fit the thick dominos- does yours?

What is the country of origin?