Hey RC enthusiasts! This handy kit from FEICHAO includes 8 transmitter switch fixed nuts plus a spanner tool - exactly what you need for maintenance and repairs on your radio transmitters. Compatible with popular brands like Futaba, JR, Frsky, and specifically models like T8FG, T14SG, T18sz, T16sz. You get both short version (3.8mm height) and long version (4.8mm height) nuts to cover different applications. The nuts have a 5.1mm inner diameter and 11mm outer diameter - perfect standard sizes for most transmitter switches. The included spanner makes installation and removal super easy. Whether you're replacing worn-out nuts, upgrading your transmitter, or doing routine maintenance, this kit has you covered. The red color adds a nice custom touch to your equipment. Keep your RC gear in top condition without hunting for hard-to-find parts. Essential for any serious RC hobbyist who wants to maintain their equipment properly and avoid downtime during those important flying sessions!