Sufficient : you can 60 pieces of 2.8 mm solid silver pencil refills in 10 boxes in each package, 6 pieces per box, sufficient allows you to replace your carpenter pencils in time to make and clear lines to avoid drawing again and again, improving your work efficiency; You can also share with your colleagues Clear and Obvious Color: hole mechanical construction pencil replacements adopt silver ink, which can more clear and obvious to look when marking darker surfaces; Due to the pencil replacements are less erasable, you can also use to a of surfaces with Work Without Worries: these mechanical pencil refills made of metal material are strong and sturdy, will not break and fade easily during the woodworking, drawing or marking process; You can complete your work effortlessly without worrying about accidents at work Apply to Surfaces: pencil refills for carpenter pencils can be applied to surfaces with material and less erasable feature, including oily, rough, , wet, dry, icy and rusted surfaces, suitable for construction, woodworking, architect drawing and so on, meeting needs in your Versatile Applications: colored pencils refills have a wide range of application, befitting for scribe tool, carpenter pencil, carpenter tools, engraving tool, glass , glass engraving and more, you can use your creativity to make more combinations for more functions Colour:silver Material: Size: 2.8 MM Package Contents: 60 x pencil refills(6 pieces per box) Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.