R thread anchor bar or called rock bolt soil nail which is a kind of threaded hollow bar, bar surface with an rope thread, it is very poplar all around the world.
Low Cost Swivel OTG USB 2.0 3.0 Flash Drive 8gb Custom Stick Made in China product description Mini metal OTG USB.OTG drive work with mobile phones and tablets, which support OTG function, with Android, version 4.3 and newer-most devices manufactured from