THIS IS AN ABBOTT WORKHOLDING KTT1210P1 3 JAW CHUCK. ITS SPECIFICATIONS INCLUDE A CHUCK SIZE OF 10 INCHES, AN A DIAMETER OF 12 INCHES, AND A B HEIGHT OF 4 INCHES. THE D SLOT MEASURES 0.630 INCHES, THE F HOLE SPACING IS 1.181 INCHES, AND THE G BOLT SIZE IS M12. THE J DIMENSION IS 2 7/8 INCHES. THE MATERIAL COMPOSITION IS 6061 T-6 ALUMINUM.