Techniks 67.05.046.001 | BT30 Taper x 1/2" Maximum Capacity x 31.75mm Diameter x 92.50mm Projection Length Drill ChuckTechniks mission is to provide high quality and innovative solutions that optimize manufacturing processes for customers engaged in metalworking, composites machining, and woodworking to meet the most challenging applications, improve machining processes, and create cost efficiencies. Capacity from 1 16" to 1 2". 4 times greater holding power. Balanced to 10,000 RPM. T. I. R. is 0. 0008" or less. One ppiece design for greater rigidity and safety.