1. Outer diameter :800-35mm 2. Inner diameter:20-750mm 3. Pitch :800-30mm 4. Thickness :2-8mm
Drill bit typer :twist drill ,auger drill,wedge-shape prismathic drill .
Installation of the spiral blade :single spiral blade ,double spiral blade ,half-duplex spiral blade .
Production Application: The products are mainly used for root crops planting hole, tree fertilization holes, fencesscaffolding staking hole,optical cable marking stake, pile of road marking,mark holes of boundary marking, buried hole of geological survey and geophysical detector, fish on winter ice by drilling holes, etc.