Normally, when you use a mechanical pencil, the lead wears down on the writing side first, so the lead gets progressively scratchier and sharper as you use it. Then, you have to rotate the pencil or just accept that your writing will have an inconsistent width and feel. The innovative Uni Kuru Toga lead advance system
Uni Mechanical Pencil Kurutoga Pipe Slide Model 0.5mm, Black Body (M54521P.24) : Office Products
The Uni Kuru Toga pencil is truly - and literally - revolutionary. When using a normal mechanical pencil at a typical writing angle, the lead point quickly becomes chisel-shaped. This leads to broader, less precise lines; and crumbling of the resulting sharp edge. The unique gear mechanism of the Kuru Toga rotates the lead every time it is touched to the paper, resulting in a clean cone-shaped tip which is sharp and resistant to breaking. Simple, yet brilliant.
Uni Kuru Toga Mechanical Pencil - Pipe Slide - 0.5 mm - Blue
The Kurutoga has a Core Rotation Mechanism that continually rotates the pencil lead as you write. A spring-loaded clutch twists the lead incrementally every time you lift the pencil from the paper. This allows a uniform wearing of the lead so that it always remains pointed. This is great for students! It gives you an amazingly thin line. In effect, you use only 50% of the lead Area that you were previously using with your old mechanical pencil.
Uni Kuru Toga Mechanical Pencil - Pipe Slide - 0.5 mm - Black
Mechanical Pencils – Page 3 – St. Louis Art Supply
Line Friends Brown X Minions uni Kuru Toga 0.5mm Mechanical Pencil Pink
Mitsubishi Pencil Co. – Page 6 – St. Louis Art Supply
Uni Mechanical Pencil Kurutoga Pipe Slide Model 0.5mm, Black Body (M54521P.24) : Office Products
Uni Kuru Toga Mechanical Pencil, 0.5 mm, Black, Pipe Slide – St. Louis Art Supply
Mechanical Pencils – Page 3 – St. Louis Art Supply