The 81-Piece Precision Gage Block Set is a high-quality tool for metalworking inspection and measurement tasks. Made of durable steel, these rectangular-shaped gage blocks are stored in a hinged wooden case for easy storage and organization. With precise measurements ranging from 92-6148, this set provides accurate and reliable results for professional use in CNC, metalworking, and manufacturing industries. This set is complete and the blocks are in top notch condition, most still in protection paper.