Sherline Step Block Hold-down Set 3013

The step blocks are notched as are the back of the clamps to make it quick and easy to set your clamps to the proper height. A selection of threaded studs from 1" to 3-1/2" is provided to allow a variety of heights to be selected quickly. The nut and washer design is a nice touch too. The bottom of the nut is convex while the top of the washer has a matching concave surface. Even if the clamp isn��t level, the washer will seat flat on top of it while applying even pressure. Also provided is a spare, unanodized step block that you can cut down to make smaller size step blocks for low setups. At least one set of hold-down clamps should be considered a necessity for every milling machine owner.Maximum height of part that can be clamped with the screws provided is about 3" (76 mm).