The setting on Scotts Wizz Hand Held Spreader varies depending on the type of seed you are applying. There will be a Settings Chart located on the bag of the seed you are using for reference. You may also contact the manufacturer of the seed company directly.
Unfortunately, we do not carry Spectracide Insect killer Granules. Regardless, if the bag does not include what setting to use for your specific spreader, we would recommend to calibrate your spreader; you can find a helpful video at the bottom of our Granular Spreaders page. You can also check Scotts Spreader Tool page to see if they have a setting for this specific product.