50mm Metric Shaft Collar Set-Screw Type, Steel - 34LM050P5" Fully metric, including set screw Simple and economical Available in steel and stainless steel Stafford Metric Shaft Collars are fully metric in all specifications, including the set screw. Set Screw Collars are oldest type of shaft collar. They function by gouging the set screw into the surface of a soft shaft. They are a low cost answer when frequent adjustment is not a consideration. Stocked in: Steel Black Oxide finish Steel Zinc Plated