THE OMER E ROBBINS MAGNA SINE MODEL A-5 IS A MAGNETIC CHUCK MANUFACTURED BY ROBBINS. THIS TOOLING IS A TYPE MAGNA-SINE WITH A MODEL A-5 DESIGNATION. THE PHYSICAL DIMENSIONS OF THE CHUCK ARE 7 INCHES IN LENGTH, 6-1/2 INCHES IN WIDTH, AND 5 INCHES IN HEIGHT. IT IS DESIGNED TO OPERATE ON 110 VOLTS DC AND HAS A POWER CONSUMPTION OF 8 WATTS. THIS UNIT IS AN ELECTRIC TYPE CHUCK WITH A RATING OF 17.