FB-42 Split Set Bolt is used as an alternative support friction bolt stabilizer of FB-47 Split Set Bolt for underground or above ground projects in mines, tunnels or slopes or wherever reliable ground support is needed, especially in mechanised jumbo development and production. Our FB-42 Split Set Bolt was made by high strength steel strip which with very low level of Si & P in chemical components to make a perfect performance in ground support, and help to have a good quality in galvanizing.