Magnaflux Rail-mounted roller-type Steady restMagnaflux Rail Mounted Roller Type Steadyrest Mounts and moves on rails to accommodate various part lengths A pair increases weight capacity from 300 to 1500 lbs Adjustable height Fits all units except the A 915 and MAG Series units NOTE: Also order Raising Block 14786 if used with 16", 20" or 25" coil. The Magnaflux Rail Mounted Roller Type Steady Rest mounts and moves on rails with adjustable height to accommodate various part lengths. Fits all