With over 54 years of experience, Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Together with this core group of products, we continue to meet the needs our customers with our expanding range of fine art, hobby and craft supplies, our large selection of drawing room furniture, and our wide assortment of exclusively-designed products. Refillable drafting and drawing instruments have a stainless steel point . Ink produces a fine .18mm black mark. Pens are for drafting, graphic arts, sketching, and design. Remarkably versatile refillable drawing instrument handles like a pencil, moving in all directions without snagging or digging into the drawing surface.