The HowNot2/climbing Taiwan removable bolts slap

I use these for exploratory cave climbing, and they are great. They come out super easy, tighten well, and handle the mud and grit underground like a boss. Like concrete screws but you don’t needs an impact and you can clean one handed. Also, you can just slot a 10mm bolt in if when you figure out where you want your permanent bolts. Highly recommend.