4 holes Rolling 360 Degre support non-tilting design 100% new and good quality This standard pivot is designed to attach our boat chairs to a boat, but it is very versatile and fit many commercial applications such as buses, trucks, , motor homes, etc. This turntable can be drilled to make additional holes to fit most seats. Color: black Material: metal Size: 15.4 * 15.4 * 2 cm Package Contents: 1 x 360 degree rotating seat Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.