These Casio G-Shock Watch Band Adapters will allow you to convert your G-Shock from a rubber band to be able to use straps like the HDT Design Z.U.L.U. Nylon Nato Straps for better fit, comfort and durability. The adapters comes in pair of two and the correct strap width to be used is 24mm. You can use a 22mm strap but there will be some play. Remove the standard polyurethane strap, using the removed spring bars, attach the adapter. As you will not be able to see the spring bar hole on one side, it is little tricky to get the spring bar in place. Keep trying by pushing the end of the spring bar with Spring Bar Tools \"Y\" end. Make sure spring bars are in place by pulling the adapter. Compatible G-SHOCK Models: DW5600 series, DW6900 series, GA100 series, GDF100 series, GL7200 series, GLS5600 series.