* It is a bolt cap used for bridges, soundproofing wall, edge,
  and street light, and is used to something for which length
  of the basic anchor bolt is below 7~8cm.  
* It can prevent safety accident as its surface is attached
  with highly bright reflective tape.

* It blocks the inflow of air with the close attachment 
  of boltcap  to rubber on the lower part, prevents the
  melting down and maximizes an economic effect as
  well as the prevention of corrosion.