The Rolling base flooring attachment is designed for easy installation on all DEWALT mallet-actuated flooring tools (dwmiii and DWFP12569). it has a tool-free adjustable lever to easily transition between various flooring thicknesses, from 1/2 in. To 3/4 in. Its non-marring, smooth-gliding wheels allow you to easily roll along the flooring during installation. Plus, the long-life components ensure that this attachment will hold up.