East R/C Aluminum Safety Spinners - These prop spinners are our premium Brushed Aluminum Prop Spinners. They come ready for installation. Check the prop shaft size chart HERE if you don't know the thread required for your engine. **NOTE - You can adjust your quantities in the shopping cart after your selections have been made. Ignor the shipping rate calculated, we will calculate the correct shipping for these lightweight items and make corrections DOWN before you're charged. We never change shipping UP without your prior approval!