3M 344 Dynatron Yellow Spreader, 3 in x 4 in, PK144 97590 Length: 65 Length: 65 Material Aluminum Mounting Hole Center to Center 200 mm Finish Unfinished For Use With Linear Shafting Shaft Material Carbon Steel Product Type Linear Support Rail Shaft Material Grade 1060 Standards ISO System of Measurement Metric Support Rail Material Aluminum Support Rail Drilling Pre Drilled Mounting Surface to Shaft Center 70 mm Mounting Hole Type Threaded Series SRMPD Profile Type Standard Profile Mounting Hole Center to Shaft End 100 mm Surface Hardness Minimum 60 HRC Rail End to Hole 100 mm Country of Origin United States A special flexible spreading edge makes precise application of body fillers Dynatron Yellow Spreaders are long lasting tools designed for the body repair professional