Theresa May has appealed to Scots to "strengthen my hand as I fight to strengthen the Union" by voting Conservative in the general election.
The Prime Minister made her pitch at the launch of the Scottish Tory manifesto in Edinburgh.
Scottish party leader Ruth Davidson used the same event to call on voters to use the June 8 poll to "bring the SNP down to size".
Mrs May told supporters Scotland "can play a bigger role in our shared national life" as she promised to help the country "grow and flourish".
However, the SNP said the Prime Minister would prioritise a "hard Brexit" over protecting Scottish jobs.
While the 2015 election saw voters elect just one Scottish Conservative MP, the party is now targeting several seats north of the border, having made significant progress in May's local elections.
Mrs May said: "A general election which is defined by one question, and one question only: who can lead us through Brexit and get a deal that works for the whole United Kingdom? Who can lead our country, and strengthen our Union, in the years ahead?
"Every vote for me and my team will strengthen my hand in the negotiations to come. Every vote will help me get a better deal for the whole United Kingdom. And every vote from Scotland will strengthen my hand when I stand up for our United Kingdom here at home."
Mrs May said only her party "has the strength and credibility to stand up to the nationalists".