Has a small screw which once dropped cannot be reinstalled and cannot be held in place. I used tape, crazy glue, and zip ties to make it another year, but it just didn't work right in the end. After 3 months it was clearly a bad buy and I had used it sporadically for 2 years but ended up in the trash. A far cry from the real Yankee drill I've used for decades. I am seventy and have been actively working with such instruments since my early youth. It wasn't worth my money.