Techniks 23659 | CAT40 Taper x 1.750" Diameter x 2.500" Shank x 8" Projection Length SBL6 SlimFIT ToolholderTechniks 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. Techniks SlimFIT Collet Chucks are individually lab tested, inspected, and certified for quality. The holder is balanced to 25,000 RPM at G2. 5 Tolerance so that T. I.