This one is one of the best designs for cuban links locks very sturdy and already produced and working pretty good.3 Parts Model

All Messurments in Pictures

This for links size of 17mm Stones information: 1.5mm round stones in total 270 stonesDiamonds weight 3.4tw

Metal Weights: 14K - 26 grs / 19.8 DWT 10K - 23.2grs / 15DWT

More Cuban links lock sizes avaible

13mm Cuban Lock:www.cgtrader.com/3d-print-models/jewelry/brooches/13mm-cuban-link-lock-large-version-3-parts

15mm Cuban Lock:www.cgtrader.com/3d-print-models/jewelry/necklaces/15mm-cuban-links-or-bracelet-locks

23mm Cuban Lock:www.cgtrader.com/3d-print-models/jewelry/brooches/23mm-full-stones-cuban-links-lock-3d-print-model

Need a custom design or modification feel free to ask me