[Features] ●For attaching ducts, hanging bolts, and hollow cement hangers. ●Shaft press-fit type (patented) is strong against dislodgement and twisting. ●The dodecagonal surface contact type is easy to insert into the nut. ●Convenient for tightening nuts when the bolt protrusion is long.
[Use] ●For attaching ducts, hanging bolts, hollow cement hangers, etc.