Nope, you twist them in and twist them out the reverse way, never just yank. They are commonplace on longhair forums, and those ladies are obsessed with gentle. You can get cheap knocks offs on eBay if you want to try them, they don 't have little 'bobbles' on the ends tho so you might want to add a dab of nail polish or glue to form one. Check them out on YouTube, you will see people screwing them in and out.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.