钴含量8%的高速钢，经久耐用，性能优异
博世快换夹头用于高效取出废料、更换开孔器
Electricians and plumbers find hole saws invaluable for installing pipes, electrical boxes, and recessed lighting. Ideally, they want to carry just one kind of hole saw for the challenges and materials that interior installation presents. That's why we have the PRO Multi Material.
