Lightweight prop adapters to fit motors with 2.0mm shafts. Set screw attachment to motor shaft and screw/washer prop retention. Prop shaft is 3mm minimum diameter and is stepped at 4mm and 5.5mm to fit a variety of popular prop sizes. The EFLM1993A will fit GWS MicroSpeed up to 5" diameter and EFLM1927 will fit the GWS 6x3 and 7x3.5.