The 2 piece set includes one table that is 4 by 4 by 2 ft. and a table that is 4 by 2 by 1 ft. high (as shown in picture above), OR, a ramp 4 ft. long that attaches to the 2 ft. high table. Basically, for your second piece you can purchase either a table attachment or ramp to attach to the 4 by 4 by 2 ft. table. There are many options and possible combinations of table sizes and ramps, you may select an extra ramp and 1 ft. high table or just all ramps on 4 sides of the 2 ft. high table, same with all 4 tables. The tables are attached with nuts and bolts, ramps attached with hinges and rods. After unpacking, you will need to drill the holes for the nuts and bolts. Instructions are included. We will make the table top, but you will need to attach the legs and braces, again need to drill holes. The ramp will be complete and packed as a whole.