Graham Orm
Established Member
I had one of these old Helix school types which worked great,but inevitably got lost. I've scoured Ebay for one, there are lots, but there seems to be a great demand for them and they all have multiple bidders paying up to £9 plus postage.
I tried a modern copy from a stationery shop with a plastic nut to hold the pencil. It doesn't hold the pencil and strips the thread when you try to tighten it.
I spotted these for £2 inc postage.
They look cheap and nasty, but to my surprise every bit as sturdy as the old Helix. Nice stiff nut (leave it!) so no slipping and slim and delicate enough for fine work.
http://www.ebay.co.uk/itm/151100890433
I tried a modern copy from a stationery shop with a plastic nut to hold the pencil. It doesn't hold the pencil and strips the thread when you try to tighten it.
I spotted these for £2 inc postage.
http://www.ebay.co.uk/itm/151100890433