4pcs/set Allen Hex Hexagon Screwdrivers Key 1.5mm 2mm 2.5mm 3mm Screw-driving for RC Helicopter Drone Aircraft Model Repair Tool 4pcs/set Allen Hex Hexagon Screwdrivers Key 1.5mm 2mm 2.5mm 3mm Screw-driving for RC Helicopter Drone Aircraft Model Repair Tool. Sale price : $8.83 Category : Toys & Hobbies