Our premium grade red chalk is 100% OIL FREE which means it will not soak into your wooden turkey call and damage it. Most importantly it is a softer chalk, and sticks to your call longer between chalkings than regular harder chalks, giving you more hunting time and less down time. Our chalk keeps you hunting and your call making its proper sounds. One of our large half balls of chalk will last you MANY years! Recommended for use on all wooden turkey calls.