Amazon offers the
Irwin Tools Bi-Metal Blue Utility Blade 50-Pack, model no. 2084300, for $12.94. Add it to your cart and the price drops to
$10.35. Plus, Prime members bag
free shipping. (Non-members can spend $35 or more to qualify for
free shipping; otherwise,
shipping costs $5.39.) That's the lowest total price we could find by $6. The blades fit most utility knives. Deal ends December 31.