Quite possibly the best digger out there.  You can't beat the Fiskars lifetime warranty - best in the industry!

Material: Multi
Color: Original Version
Brand: Fiskars
Item Dimensions LxWxH: 0.75 x 1.5 x 13 inches
Style: Garden Knife
Handle Material: Aluminum
Blade Material: Stainless Steel
Is Foldable: No
Grip Type: Padded
Ideal for a variety of garden tasks, from digging to opening bags
Padded, oversized handle provides exceptional grip and comfortable use
Polished cast-aluminum head resists rust and won’t bend or break while digging
Sharpened blade with serrated edge makes carving into hard ground easy