Uni-ball Shift Pipe Lock Drafting Pencil-black Body with Smoke Accent -0.5mm-& Diamond Infused Leads [Nano Dia-40 Leads] for Professional Value Set(with Values Japan Original Discription of Goods) The pencil for drafting for corresponding to a pro The shift grip which changes on/off is used It excels in the visibility at a tip and can write a character and a line correctly. The low let model of the low center of gravity which enables the stable note It is smooth and they are a spare lead which cannot break easily, and the profitable set which attached Nano Daia (hot product of Uni) together.(HB 40 Leads)