Pentel Tranxition Mechanical Pencil, Black, .7mm (Box of 12) Box of 12 Tranxition mechanical pencils which take 0.7mm leads Lead Maximizer system offers 24% more use from each Pentel lead piece Continuous lead feed saves time by advancing reserve lead into writing position Heavy spring-loaded clip grips notebooks and folders Reliable with Pentel's super HI-POLYMER lead and Z2-1 eraser