Each package has 12 pen turning kits with black refills;creating different projects; The sets are enough to share with your family, making your craft more enjoyable The size of this pen turning supplies is suitable, the double-tube design measures about 0.28 inches/7mm, the tube length is about 2.09 inches/53mm, and the minimum blank size required for turning is 5/8 inches x 5/8 inches x 5 inches; This means the kit is and compact, and can be stored comfortably for later projects; The fineliner pen set is composed of iron and brass materials; This material composition not only determines the lifespan of the components, but also prevents them from accumulating rust or breaking; Due to reliable quality, these kits their smooth , easy handling, and long-term use. Unleash your creativity with our woodworking pen kit; this assembly opens up DIY possibilities and inspires imagination; with this kit, crafting is not only a leisure activity, but also an opportunity to develop practical skills while adding excitement and satisfaction to your hobby Pen making supplies do not include a pen lathe, spindle, drill, or wooden blanks; these additional items are necessary for a successful crafting experience and should be prepared separately The iron and brass alloy materials the durability of the pen turn kits. Despite frequent use, these kits remain stable and can you for a long time. Dimensions: Double : . 0.28inch/7mm Length: . 2.09inch/53mm Note:It's DIY kits, needs to finish by yourself. Colour: Material:Metal Package Contents: 1 x slimline pen kit(12 pieces/4 colors, 3 pieces each) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.