Hillman 3/16 in. x 3/4 in. Woodruff Key (5-Pack)

Woodruff keys are semi-circular keys that are commonly used for mechanical applications. It fits in a half-moon shaped slot, in a shaft, leaving the flat side of the tab exposed. They are designed not to function when excessive force is placed on the shaft.

• Steel construction for longevity
• Requires no mill holes near shaft shoulders
• Ideal for mechanical applications