The Blick Premier Mechanical Pencil is a stellar value at under $10, and it’s more foolproof than other mechanical pencils. Unlike most other retractable options, which require you to hold down ...

The pencils are available in 0.5, 0.7 and 0.9 mm sizes. My next thought was to drill out a 0.7 mm to 0.8 mm but some the collet like clamp at the end needs to be pushed down and held to be able to ...