This is a very fine aluminum oxide. I mixed it with portland cement and fine borosilicate in a 1:1:1 ratio and used it as a refractory. It is very hard and can withstand very high temperatures.
π§ Efficient Astro Tools 1442 A32 Mandrel 4 20 for Precision Work
3 Review
π¨ Enhance Your Woodworking Skills with PSI Woodworking PKM FLC Maxi Mandrel Morse
3 Review
Merit M 9 2 5 Extra Shank Length Cartridge Diameter
3 Review
π§ Astro Tools 1442 A34 10 24 Mandrel: Top-Quality Precision Tool for Efficient Operations
3 Review