170mm Blue/black
Check consumables trolley, may be some blades.
What is a drywall saw: https://www.wonkeedonkeetools.co.uk/handsaws/what-is-a-drywall-saw
31 Types of saws: https://www.garagetooladvisor.com/hand-tools/different-types-of-saws-and-their-uses/