The legs of most tripods are joined to the head via bolts through the top of each leg, however the Ultra MAXi incorporates non-piercing bolts: (i.e. each leg extends the entire inside length of the outer leg casing), making the tripod extremely compact when folded, yet when extended the tripod measures a full 155 cm. This unique system is called the Trunnion Shaft System (TSS). Suitable for most compact digital cameras and camcorders.