The Manfrotto 116SPK3 Retractable Spiked Foot Set is an optional upgrade made to fit exclusively upon the 190CXPRO4 tripod.

A broad, tough spike made from a hard-wearing anodized aluminum alloy, it significantly increases stability on soft earth surfaces.  The spike's surrounded by a retractable hard rubber foot with tapered concentric circular rubber ridges that get smaller as they approach the ground surface.

These tripod feet can be removed and replaced at will, even in the field.