Want an extension pole for lifetime use, Smatree® SmaPole S1 for GoPro is your best choice

 

Smatree® SmaPole S1 is made of high quality aluminum-alloy for lighter, stronger and lifetime use. Different from the other plastic top of pole, Smatree® adjustable handheld pole is integrated with a tripod mount that has a CNC molded aluminum-alloy nut, never to worry about losing the nut. Really Convenience! 
Size: retract to 15.8″, extend to 40.5″

The pole is divided into 3 sections; each section has a fast lock clasp links, adjustable firmness. 

6.3″ of Sponge coil in the bottom of the pole, it will avoid people's hands be ground injury, it can control the shooting angle of the camera more easily as well. 

As the pole bottom is equipped with a blue cord buckle, this can prevent pole falling or losing when you are surfing, or going on high-speed movement. 

You could also use Smatree aluminum wrench to tighten your screws, whatever Smatree screws or Gopro OEM screws. They can strengthen products to the most stability when you are surfing, racing, parachuting etc.