For sale is a Magna-Lock Model SA-5 Electro-Magnetic Sine Chuck. 6" X 6-1/2" Nominal area of working surface. 6-1/8" X 6-5/8" Actual area of working surface. Fine-line construction (approx. 0.16" line- to-line). 4-7/8" Height of working surface over base (at 0 degrees inclination). Made in the USA. Note: I have performed a basic test on this chuck, and it is in good working condition, ready for use in your application. Approximately 45 pounds net weight.