Allied Machine & Engineering 220Z0S-075L Hardened Tool Steel T-A Drill Holder - Straight Flute, 3/4" Diameter Straight Shank, 7/16" to 1/2" Drill Insert Range | Ideal for Precision Drilling in Hardened Steel, Metal Fabrication & Industrial Applications

T-A Holders are for use with Original T-A and GEN2 T-A drill inserts. Original T-A drill inserts are an excellent choice for general purpose use. GEN2 T-A drill inserts provide lower drilling forces and increased drill stability. Precision, performance and productivity are core features of Allied tooling and our commitment to innovation in all aspects of hole making technology means we continually set new industry standards in production efficiency and tool life.