Can anyone identify what this is?

The reds pick this mysterious object. It could be a Ship Builders tool. Any ideas?

29 January 2018

2 minutes

This clip is from

Bargain Hunt—Series 49, London 9

Does this piece of heavy metal rock your world?—Series 74, Leominster 16
Duration: 03:08
Imagining what life was like for millions of soldiers in the First World War trenches.—Series 74, Detling 9
Duration: 04:57
Keepsakes that once belonged to entertainer Arthur Askey go under the hammer.—Series 74, Newark 2
Duration: 04:38
Christina Trevanion buckles up in a vintage muscle car for a lap of one of Britain's fastest racetracks.—Series 74, Exeter 11
Duration: 04:39