Adjustable parallel pairs are individual pairs of matching-sized parallels used to keep items level for machining or inspection. Adjustable parallel pairs and sets keep items level for machining or inspection. These parallels have two-piece construction that can expand with the two faces sliding against each other and secured at the desired size with one or more set screws. When they are secured in a vise under the part, they are frequently used for machining, milling, or drilling. With a range of sizes that can be easily measured in a caliper and secured with set screws, these tools do not perform any direct measurements but can be an indispensable and versatile tool for layout, setup, and positioning needs. When secured in a vise under a part, they are frequently used for machining, milling, or drilling. These tools do not perform direct measurements but can be a versatile tool for layout, setup, and positioning needs.

Adjustable parallel pairs are individual pairs of matching-sized parallels used to keep items level for machining or inspection. Adjustable parallel pairs and sets keep items level for machining or inspection. These parallels have two-piece construction that can expand with the two faces sliding against each other and secured at the desired size with one or more set screws. When they are secured in a vise under the part, they are frequently used for machining, milling, or drilling. With a range of sizes that can be easily measured in a caliper and secured with set screws, these tools do not perform any direct measurements but can be an indispensable and versatile tool for layout, setup, and positioning needs. When secured in a vise under a part, they are frequently used for machining, milling, or drilling. These tools do not perform direct measurements but can be a versatile tool for layout, setup, and positioning needs.