Hydra Pools HPSFOB Fold Over Turnbuckle Brace - This high-strength brace is for use with Hydra in-ground pools. It is constructed of durable materials. Made for easy installation and use, it will help ensure the best service life possible. Inside and out, only the finest goes into Hydra pools. Our precision engineering means that every part is meticulously designed and fabricated for flawless fit and finish.