Bronze sliding goosneck

Functional bronze gooseneck fitting for yachts.
Matte-rolled finish. Track rails screw on. Car with holding screw or square spike can be mounted on a wood or aluminum boom.
Track: L = 300 mm, W = 22 mm. Spike: 10 x 10 mm, L = 100 mm.

This fitting allows the mainsail to be reefed by rotating the boom.