The Lie-Nielsen version of the side clamping style of honing guide is solidly machined from Stainless Steel, with a Bronze bearing.
It features removable jaws: replacement jaws are available for Chisels 3/16" and under, tall jaws for Mortise Chisels and thick blades, long jaws for very short blades and angled jaws for Skew Blades.
Lie-Nielsen have designed these jaws for their own blades and chisels, not other makers'.