There are other brands out there that do the similar job and you can get replacement leads of various colours too I do like the design of the pencil that has a built in pencil sharpener on the side and the clip hold the holder firmly in place Deep-hole maker: the deep-hole carpenter pencil designed with extended and needle-nose tip of 100 mm in length, reaching hard-to-reach areas where other carpenter marker do not go, suitable for marking through holes or in other tight areas I do love my tracer pencils and pen set and find it better than just a standard pencil as I have lost various pencil sharpeners. Marks on various surfaces: the solid carpenter pencil can draw on metal, plastic, glass, wood, paper; The drafting pencil are strong, which are grease to trace everywhere and stronger than hard, Rugged ABS belt clip for a secure grip.

Built-in sharpener for precise marks: the pencil sharpener is screwed into the top of the mechanical drawing pencils, which won't get lost either and your mecanical pencil will always be sharpened for nice precision The only issue I have is the pencil itself is designed to go in and out of the holder easily but sometimes it is too easy and I have lost some of my expensive pencils this way