Keep this 75mm Tie-Down KNob for FSB 75 and FSB 75 MKII Heads in your kit as a replacement or spare. The lightweight yet durable polyamide plastic and stainless steel construction matches the M10 threading on your fluid head, allowing you to mount and secure it onto your 75mm Sachtler legs with a 75mm bowl. The tie-down is over 6″ long, providing you with a large gripping surface, and the two extended flaps allow you to tighten and loosen it without exerting excessive pressure.