No.1: 1/16in + 3/32in + 5/32in + 1/8in No.2: 1/4in + 3/16in + 5/16in + 7/32in No.3: 11/32in + 7/16in + 15/32in + 1/2in No.4: 23/32in + 3/4in + 7/8in + 1in Material Made from high-grade solid aluminum, stress-relieved against distortion, precision-ground and hardened for durability and accuracy. Cross Design Cross-shaped setup block height gauge with four height measurements for quick and convenient checks. Easy Storage Packed in a plastic case for protection, easy storage and transport. Use scenarios - In milling or drilling setups, quickly verify workpiece height and align fixtures for repeatable cuts. - For jig and fixture assembly, set precise heights and spacings to ensure consistent hole or pocket placement. - In woodworking or metal fabrication, use the four height options to confirm spacings and maintain uniform tolerances across parts.