This is a sleeve puller for .21 nitro engines. It is a 3D printed self contained unit thats very easy to use. It is printed is a very durable carbon infused material, not your type cheap plastic.
Tool has been inspected and tested by some of the best nitro engine guys in the midwest.
To use: Remove engine head and button, retract piston to lowest point. Insert tool allowing notch to sit in the exhaust port. Using thumb, press top hat into the sleeve to keep tool locked in place. Thread tool down to slowly pull out sleeve.
Tested primarily on OS based .21 engines but most are similar.
