Nut drives are for fastening nuts. In RC car industries, 5.5, 7 and 8 mm are mostly common used. Usually for fasten the wheel nuts, when 7 mm is for typical 1/10 vehicles, with 12 mm wheel adapters, and 8 mm is usually for 1/8 or bigger scales, with 17 mm wheel adapters.
Brand: PN Racing
Model: 711945
HKD 74.00 HKD 78.00
Brand: Traxxas
Model: 8719
HKD 468.00 HKD 546.00
Brand: Xtra Speed
Model: XS-59850
HKD 35.00 HKD 38.00