Key Way Aligning Wrench. This tool is ideal for inserting and removing your 5C, 16C or 3J collets from your spindle or fixture. The handle on the 5C is manufactured from 6061-T6 Aluminum and anodized black. The fingers are made from spring steel. The 16C and 3J have an aluminum handle with a one piece head made from 4130 Steel! Select 5C, 16C or 3J.