Description: The tool is designed to remove difficult threaded studs or install them Knurled rollers cam users action to grip the stud tightly and minimizes damage The cam rotates to grip the stud to quickly and Suitable for a range of heads including studs, main studs and carburetor studs for use with 1/2" ratchet, for dowels from 1/4" (6mm) to 3/4" (19mm) Specification: Material: Metal Size chart: Size: approx. 70 x 5 5 mm / 2.76 x 2.17 inch Package include: 1 piece puller puller puller Note: Please allow 0.5-1 inch difference due to manual measurement. (1 inch = 2.54cm). Please check the size and picture carefully before payment. Please understand due to the difference between different monitors, the picture may not reflect the actual the color of the item.