4) Dorian Tool Series BXA, Number 881, Threading Tool Post Holder with External On Edge Cartridge 4-31/84 Inch Overall Length, 1-3/4 Inch Overall Height, 1/8 Inch Thick, 1 Inch High Centerline, 3/8 Inch Insert Inscribed Circle | 4) Dorian Tool Series BXA, Number 881, Threading Tool Post Holder with External On Edge Cartridge 4-31/84 Inch Overall Length, 1-3/4 Inch Overall Height, 1/8 Inch Thick, 1 Inch High Centerline, 3/8 Inch Insert Inscribed Circle |