Two shakes are all it takes. Click pencil top to advance tip. Then shake barrel twice to expose the desired amount of lead to ensure minimal lead breakage. Jolt Mechanical Pencil features revolutionary Sliding Sleeve Technology that automatically advances lead for uninterrupted use. Clear window displays a unique spring mechanism. Contoured barrel provides added comfort for extended periods of time. Soft, latex-free grip provides added comfort and control. Pencil is refillable with Pentel Super Hi-Polymer lead and PDE-1 erasers. HB lead is equivalent to a No. 2 pencil, and it scans on tests, resists breaking and never needs sharpening, Mechanical pencil is made with a high percentage of post-consumer recycled material, excluding consumable content and refills.