【Efficient Drilling 】 Built-in 1380W pure copper motor, providing speed up to 680 rpm. core dia of 1.4″(35mm) and Max. Rated Power: 1380W. 【High Safety Performance】 The magnetic base adopts a pure iron double coil design, with a steel plate thickness of more than 10mm, which has good magnetic conductivity and a magnetic attraction force of up to 11500N/2585lbf.