The ND MX-5 uses a 21mm lug nut design on all models produced before 05/01/2018 and after 04/01/2019. On all models produced from 05/01/2018 until 04/01/2019a revised, smaller lug nut design (17mm) is used.
If you are in need of a lug wrench for your ND2 (second generation ND chassis), Mazmart has you covered.