Deep-hole Maker:Deep-hole carpenter pencil designed with an extended which can reach hard-to-reach areas where other carpenter markers do not go, suitable for marking through holes or in other tight areas. Mechanical Pencil: Carpenters pencils do not slip out of the fingers and repetitive tracings cause less pain. The pen clip design can be easily attached to the pocket, easy to use and not easy to lose, gaining in efficiency, proper for construction and bricklayers. Built-in Sharpener for Precise Marks: Pencil sharpener is screwed into the top of the mechanical drawing pencils which will not get lost either and your mechanical pencil will always be sharpened for a nice precision. Thoughtful Design: These mechanical pencils will give you a comfortable and non-slip writing experience when woodworking. There are grooves on the pencil body to increase the friction when holding the pencil which can reduce the pain of your hand by a long-time working. The long and thin tip design makes the pencil can reach a deep place or narrow hole to mark and draw. All Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution.