!Deep drill hole exceeding length expansion anchor, for the fixing to steel window frame, joist, construction material(GRC).Such as Roma stake,window frame; and the best choice for the fixing of the floor joist Especially for the fixing of the parts which is exceedingly deep and thick. ! SCRE:carbon steel wire stamped to meet the standard of DIN, galvanized & sublimed on the surface. SLEEVE:hot galvamized steel roll(thickness 0.8-0.9)to be vertical cut and then continnous die punched. ZINC SCREW CAP:die casting zinc alloy casted in hot chamber die casting machine,surface color zine plating. ! Monnted on C30 concrete block, tested on the tensile test machine, the faihre limit should exceed 7000N. Allowable ensile:suggestion:single vertical rating allowable tensile load should<4000N.