Techniks 22927-4 | CAT40 Taper x 1.250" Size x 1.750" Diameter x 4" Projection Length x 6.690" OAL Steel End Mill HolderTechniks 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 End Mill Holders are precision machined to an Industry Leading H5 standard I. D. hole tolerance. Techniks End Mills are balanced to 15,000 RPM at G6. 3