TTC Set of 1 Square, 1 Hex, and 1 Collet Closer - Size: Set Each block weighs 1 lb. and dimensions are approximately 1-3/4" x 1-3/4" x 2-3/4" long. Capacity: 1/16" thru 1-1/8" Made of high quality tool steel, hardened. Precision ground, parallel and square to within .0005".