HHIP 3900-5125 Square ER-40 Collet Block - CNC Tool Chuck Alloy Steel Compatible with Machine Includes Key, ER Nut

Block dimensions are 1-3/4 x 1-3/4 x 3.2" For fast set-ups on CNC machines For parallel, square or hex shapes as well as for cross hole drilling at 60, 90 or 120 degrees Made of tool steel hardened and ground to 0.0005" flatness, sureness and parallelism May be used standing upright