Therearedifferenttypesofanchorbolts: olann, thickrodandthinrod.Thewool, therawmaterialsteel, isdirectlyprocessedfromroundsteelorwirewithoutmodification; thickrods, orcalledA-type, andthinrods, orB-type, areallprocessedfromsteelintocorrespondingroddiamiffers
