NICE! BISON 12-1/2 INDEPENDENT 4-JAW LATHE CHUCK with A1-6 MOUNT #PUUf-M12-1/2A August 30, 2023 admin Made in Poland by Bison. This is a 12-1/2 Independent 4-Jaw Lathe Chuck w/ A1-6 Mount. Chuck Diameter: 12-1/2″ Number of Jaws: 4 Chuck Thickness: 3-3/4″ Through Hole: 3-1/8 Mount: A1-6. Comes exactly as shown in pictures. Share