• Consists of 2 precision ground pieces which slide smoothly on each other.
• Locked into position by set screws.
• Can be quickly inserted into openings and expanded to exact size, then measured with a micrometer.
• Packed in vinyl case.

Set of 6 parallels – 3/8 – 1/2″, 1/2 – 11/16″, 11/16 – 15/16″, 15/16 – 1-5/16″, 1-5/19 – 1-3/4″, 1-3/4 – 2-1/4″