Bessey GSM50 Bar Clamp, Heavy Duty, Sliding T Handle, 20 in Jaw Opening Max, 2,660 lb Clamping Force, F 6XKF5 Lined Bearings Mounting Hole Center Lined Bearings Mounting Hole Center to Center 120 mm Shaft Material Grade 1060 Product Type Linear Shaft Shaft End to Hole 60 mm Shaft Material Finish Polished Shaft Hole Spacing 120 mm Standards ISO Shaft Hardness RC 60 Surface Roughness 8 12 RMS Shaft Material Carbon Steel Shaft Drilling Pre Drilled System of Measurement Metric Surface Hardness Minimum 60 HRC Mounting Hole Type Tapped Shaft Type Pre Drilled Shaft Weight Per Meter 0 Deeper scratches are repairable with an Elkay stainless steel restoration kit Main Features of the BESSEY GSM50 Bar Clamp include: Steel Material: The robust bar material made from steel ensures long term durability and reliable use in heavy duty tasks accommodating large workpieces