This is the Samix SCX24 and TRX-4M 2-in-1 Nut Driver. This two in one 4mm and 5mm driver gives you the two nut driver sizes needed to work on TRX-4M and SCX24 micro crawler platforms. The driver features a high quality CNC aluminum handle and anodized in multiple colors. This nut driver is a perfect addition to your toolbox.
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