This holder is for the 10cm cups or below diameter . No tools required ,just use hand to install ,if you have hammer then would be great. For the stick,we process with the smooth treatment,and we lengthen to 14.5cm so that can hold more cups. Use the Healthy bamboo material.Bottom antiskid,safe to use. Specification: Colour: wood color Material: bamboo + wood Size: 1 Grid: 14x14.5cm Package Contents: 1 x Cup Storage Holder 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. This holder is for the 10cm cups or below diameter . No tools required ,just use hand to install ,if you have hammer then would be great. For the stick,we process with the smooth treatment,and we lengthen to 14.5cm so that can hold more cups. Use the Healthy bamboo material.Bottom antiskid,safe to use.