Those are the little things than can make (our break) your foil session. So it should be a no brainer. Most foilboards are using US Twin Tracks and there is nothing that really prevents the T-Nuts for slipping out of the tracks when not attached to your foil, meaning it's quite easy to lose them and drive you crazy if you have no spare.
SET OF 4 Includes: X4 M6 LOCKABLE T-NUTS X4 M5-19mm plastic screws for standard us box X4 M5-5mm plastic screws for shallow box X1 TEMPLATE
Packs of 2