The Impressor is a tool for testing the hardness of aluminum, copper, brass and other materials including plastics and fibreglass. The instrument is designed for use on fabricated parts and assemblies as well as on raw stock. 

• 710/934/1 Barcol Impressor Hardness Tester (25 - 150 Brinell - Flat Surfaces)
• 710/934/2 Barcol Impressor Hardness Tester (Softer metals / Plastics)
• 710/934/3 Barcol Impressor Hardness Tester (Very soft metals, Lead, Leather)