Soil auger accessories from Grainger can help you collect soil samples near the surface and create access holes for deeper soil sampling. An earth auger head has a closed-bit design to prevent the loss of sampled material in sand and dry soils. Choose an auger head with wider-spaced bits and open cylinders to collect heavy, wet or clay soils. And attach a flighted screw head to augers for penetrating hard, rocky or compacted soils.