Description Heavy Duty Pen HD14M – Medium Knife Medium Knife – Heavy Duty Fixed-Tip Pen. General detail in pyrography, gourds, hair, or feathers. Rounded heel is preferred by many artists. Much like the 14L, but for artists who prefer a slightly smaller tip. General detail in pyrograpy, gourds, hair, or feathers. The rounded heel can be very helpful when working on flat surfaces and is prefered by some artists. Cheryl Dow’s books recommend the 14SM as one of her most useful tip shapes.
