The Electric LM Rail And Blocks have tapped holes. This type can be mounted from thetop or the bottom. It is used in places where the table cannot have through holes for mounting bolts. The roller guide is a linear motion guide that uses rollers as a rolling element. The use of rollers helps achieve ultra-high rigidity. It is used in places where the space for table width is limited. The LM block has a smaller width (W). Electric LM Rail And Blocks are very effective.