Yescom USA, Inc. 4" Earth Auger Drill Bit 31.5" Depth 3/4" Shaft Black

4" Earth Auger Bit for 3/4" Shaft

This 4-inch auger bit attaches to hand-held post-hole diggers with a 3/4-inch shaft. It drills holes up to 31.5 inches deep and 4 inches wide in soil types such as silty, peaty, gravel and dry cracked ground. The tool is suited for landscaping crews, fence installers and gardeners who need consistent hole dimensions for posts, bulbs or shrubs.

Cast Steel Build with Glossy Black Finish

The pilot bit is made from cast steel and coated with a glossy black paint that resists rust and corrosion. A subulate tip and spiral blade cut into the ground quickly while leaving loose soil around the hole edge for simple back-filling and clean-up. The 3/4-inch shaft connection fits common powerheads including the YES0617 model for secure, wobble-free operation.

Replaces Smaller Bits for Deeper Post Holes

This bit replaces narrower or shorter augers when a 4-inch diameter and 31.5-inch depth are required for fence posts, flag poles or larger shrubs. The upgrade is worth it when project specs call for wider, deeper holes in a single pass, reducing the need for multiple bites or manual widening. It is not for buyers who need a smaller diameter for bulb planting or a longer bit for depths beyond 31.5 inches.