Designed for Roto molding. Extended Hex Head Hardened steel bolt 5/8-11 X 7" for use with receivers for closing and clamping spiders and molds. Price is per piece. (50 bolts per box). Other sizes are available. At additional cost, special cut lengths are available. Use in conjunction with Receivers (KC6580).Add $1.00 for each special cut length. (KC6325)