Del-Tron Precision Linear Motion Slide 401. Condition is "Used". Linear Motion Slide. A Ball Slide with a Travel Range of .5" and a Starrett Micrometer to Position the Stages. Starrett Model 463 has .001 graduations. The Table measures 2" by 1.75" and has 8 holes with 6 x 32 Threads. Slide is mounted to a base measuring 1" by 7" with 2 mounting holes having 1/4 x 20 Threads. Slide is in excellent condition. No Returns.