NOTE: If you are unsure of compatibility of this item with your watch or product, ask us first. We are genuinely happy to help. Returns are subject to 10% restocking fee and must be in new, unused condition and in original packaging to be eligible for return. Custom built items are generally not eligible for returns.These JaysAndKays® Metal Adapters are to adapt your GShock GMS5600 to use most 1-piece or 2-piece 20mm straps. For a video demonstration of this product, see our JaysAndKays YouTube channel. This item is also suitable for GMA-S2100 but not for GMS2100.The adapters are machined from aluminum and finished with a TypeIII hard black anodize.Kit includes:- (2) JaysAndKays® Metal Adapters with 20mm stainless steel springbars- (1) springbar tool- (2) 16mm quick release springbarsIf you wish to pair this purchase with one of our 20mm leather, 20mm nylon, or 20mm steel bracelets, have a look in our store for your options. We WILL ship internationally. Buyer is responsible for any import duties or taxes. We WILL ship to APO/FPO. We here at JaysAndKays are veterans too and Thank You! for your service.We WILL combine shipping. Thank you for looking!