James Hanlon was attacked with power tools after his car was run off the road in Stepps, Glasgow, in August last year. He was dragged from the car and repeatedly hit with the drill.
Last week, Robert Kirkwood admitted to the assault at the High Court in Glasgow. Two co-accused, Charles McCormack, 28, and Michael McCormick, 22, had pleas of not guilty accepted.
Speaking publicly for the first time about his ordeal, Mr Hanlon said: "I bear the physical and emotional scars of that attempt on my life. I am glad to be alive."