Same parts as in our Stinger Qaud & Tri-copter kits. Use as spares or for building custom Multi-Rotor Copters with 10mm square arms using the Radical RC parts of your choosing. Builds into 4 fixed motor mounts (Quad uses 4, Tri uses 2). Can also be used with our Quad Designers Kit. Designed for bent wire or post landing gear options as used in our Stinger kits. No landing gear wire provided. SKU Number: RRCSTFMMK