Made in the USA by Hardinge Bros Inc. These are 2 Hardinge Quick-Change Tool Holders For L18 Tool Post. Holders have been modified from their original capacities to hold larger tools. Model #: L21 & L23. Turning Capacity: 3/4″ (modified), 7/16″ (original). Boring Capacity: 3/4″ (modified), 5/8″ (original). Overall Dimensions: 2-1/4″ x 1″ x 1-3/4″ high & 2-1/4″ x 1-5/16″ x 1-3/4″ high. Comes exactly as shown in pictures.