The 504HD's patented Bridging Technology allows for a wider top plate and longer sliding plate that add stability and balance to a set of state-of-the-art professional features. A newly designed counterbalance system includes four presets--from 0 to 16.5 lbs--enabling proper balance for camera loads up to 19.8 lbs, while 3/8" threads in the top plate allow attachment of monitors, arms, and other accessories directly to the head. This aluminum two-stage tripod combines stability and strength with affordability. Reaching a maximum height of 60.6" (154cm), the 546B is capable of supporting up to 44 lbs (20kg). Its spiked feet come with rubber overshoes, allowing setups on both smooth floors and uneven surfaces, while a newly designed mid-level telescopic spreader keeps the legs exactly where you need them.