Description Pull up or chin up is one of the key components in your upper body workout and a secured pull up bar or chin up bar is more important than anything else. 5cm thick mainframe and 2.8  cm thick pull up bar 5mm thick carbon steel Please note that this 5-bolt chin up bar, though bomb-proof, will need your own manual installation that will call for a heavy power concrete drill  to punch eight deep holes into the wall, though 5 bolts and installation instruction sheet are included, many people find it hard to do that themselves and they usually hire a handyman to do that at their own extra cost. Only suitable for installing on a concrete wall in good condition, please do not install on brick walls and wooden boarded walls. Please make sure you understand this installation requirement before placing an order. Joinfit can provide installation service at an additional HK$800 to HK$1200 depending on the remoteness of installation premises, please Whatsapp: 852-46299644 or call 21519915 ask for more details.