I got myself a Big Aquis Day Date which has the same size screw as your regular old Aquis Date. I was fortunate enough to have bought a black silicone strap on a trip thinking i can swap out my straps at will but I refused to buy the oris screw driver that amounted around 200usd, that was kind of messed up. Hopped on to Amazon and found this bad boy 10 min later. Good price too.
Works like the original for a fraction of the cost
Got the 2.0mm. Works great for changing straps on my Aquis 43.5 and seems like it's built well enough to last. Save yourself some cash and get this instead of the OEM tool.
This tri-wing screwdriver is a perfect fit for the screws that attach the band to the case lugs. I highly recommend it.
make sure you order yht 2mm and the 1.6