The FLM Centerball 58FT is a heavy-duty ball head designed to hold up to 60kg, which is... a lot. As you might imagine, it's very heavily built from high quality aluminum, and it'll add almost a kilogram to your tripod's weight- but if you need to hold 60kg up in the air, I imagine that you'd have the kilo to spare. Locks are tight, and the patented FLM "angle" feature- which restricts the ball to a single tilt axis- works pretty well, too, though it's less of an absolute lock than a very strong suggestion. Cosmetic condition is excellent overall, except for a scrape on one edge of the included FLM SRB 80 Arca-style clamp. Arca plate sold separately.