Product Description Well heat dissipation allows for maximum heat dissipation, reduction of burn-in cases, effective protection to motor for long service time. With the self-lock button, you are able to maintain a speed without continuously pressing the switch, which greatly reduces fatigue. Ergonomic double handle design. Equipped with a comfortable grip for long working hours and reduces fatigue. 8 levels adjustament satisfies the demand of various polishing effect for various materials. Pure copper motor with heat resistance ensures stable power output. Using the spindle lock button provides a convenient and quick replacement of the burnishing roller. It adopts thick protective cover made of steel, to protect you from dust and debris with high efficiency.