Sold as 1 Dozen. Mechanical pencils are ready to use right out of the box. Pencils come in pack of 12 and can replace pens during many common work-related tasks or projects. Convenient pocket or notebook clip. This pencil has No. 2 lead that resists breakage for smooth writing. Refillable lead makes it economical. Safety Data Sheet. Black, hexagonal barrel. Refillable eraser for any errors made. 0.5mm medium lead features bonded break-resistant quality that provides smooth writing. The retractable mechanism allows you to use lead when you need it and keep it from breaking when you don't.