Pentel Sliding Sleeve Sharp Mechanical Pencil, 0.50 mm, Black Barrel (PS535)

Pentel Sliding Sleeve Sharp Mechanical Pencil 0.50 mm Black Barrel (PS535) Features a sleeve that slides and retracts fully into barrel to protect clothing. Both eraser and leads are refillable so you'll never need another writing instrument. 0.50 mm lead writes fine lines for extra-detailed drawings. Global Product Type: Pencils, Pencil Type: N/A, Mechanism: Mechanical, Packaging: Single., Brand Pentel, Color BLACK, 0.50 mm Lead.Refillable.Sleeve slides and retracts.
I have been a Certified Public Accountant since 1976 and have used this particular model of Pentel pencil since then. It's the sliding sleeve that first attracted me. With other mechanical pencils, you have to stop writing to advance the lead every few minutes, but with the sliding sleeve, you have three or four times the usage before you need to advance the lead. And then, to advance it, you just push the top tip with your thumb and you are good to go again. It's blissfully easy.It is a work ...