Jacobs 8871 1/4" Heavy Duty Chuck 1/2-20 Mount 7BA Clutch Alignment Kit Circular body grind to ensure

Circular body grind to ensure consistent and precise flatness

Easy-to-read analog display with convex lens

Brand 3M™ Scotch-Brite™

ceramic and natural stone

Jacobs 8871 1/4" Heavy Duty Chuck 1/2-20 Mount 7BA Clutch Alignment Kit Circular body grind to ensureJacobs 8871 1 4" Heavy Duty Chuck 1 2 20 Mount 7BA Jacobs Traditional Plain Bearing Design for Heavy Duty Industrial Drilling and Lathe Work. 1 4in (6. 5mm) Capacity, JACOBS K7 Key. Heavy Duty Design. Jacobs fluted sleeve design. Jaws Center Grind for Straightness and Alignment. Through hardened sleeve teeth, plus hardened nose and keyholes provide outstanding wear resistance. Each chuck 100% inspected for performance and precision. Chuck Capacity :