Uni-Ball Kuru Toga M5-450T Self-Sharpening Mechanical Pencil. Premium Propelling Ultra Strong Diamond Infused Leads for Technical Drawing, Writing, Arts and Crafts & 12 Lead Refills. Fine 0.5mm

Good solid mechanical pencil and nice to use.

This pencil is an incredible achievement, the rotation of the lead is a masterpiece of function. It may solve a problem that not many people have - the wearing of one side of the lead from writing and holding a propelling pencil the same way each time - and is a problem that can also be solved by holding a pencil another way round in use. However, well-worth having and it functions very well.

It is a very nice pen. The automatic turning mechanism works well and it is very nice to use. It is quite pricey but it's the sort of thing that lasts years of use.

I love this pencil, it’s beautiful good grip and very useful to write for long time.

Pencil broke within first month of use at the threaded portion. Disappointing...........

Really liked this pen, so much I bought two. One for work and one for home. Neither are used a huge amount and today one of them crumbled in my hard. Not impressed considering it was a reasonable premium pencil.Update. So yesterday the second pencil broke in the exact same manner as the first one. I've had cheap bic pencils for years, for the price of these the quality checking process just isn't good enough.