Compact and Modern Design Racks are used to hold tiles while pushers, also known as "extending arms" or "helping hands", are used to push the wall into place. Traditionally, racks and pushers are separate. But this modern set comes with racks attached with pushers for added convenience. Set of 4 One for each of your mahjong buddies! Acrylic Racks with Pushers: 17.6 x 3.2 x 1.2 inches (44.8 x 8.1 x 3 centimeters) All-in-One Racks with Pushers These racks come with pushers already built into them. No assembly required. Mahjong tiles are not included.