4.The model hole opener features a through-hole in its body, designed for inserting a pry bar to assist with turning. 3.Hollow handle,light weigt to carry,mesh design for easy to grip. 1.Wide Application:Used for opening holes in model shells, plastic carbon boards, and wooden boards. 2.Hole expander with 0-14mm graduated scale,allows you to accurately determine the depth of the drill hole. 5.The top of this manual reamer rotates for easy hand-drilling., Manufacturer: PokFhgur