【High quality material】 Made of sturdy steel, durable to use. With a gloss black painted finish, the cultivator bit will not rust easily. 【Fast digging】 Easily dig most types of soil, even clay and rock. Makes planting jobs much easier and faster, save your back and let the spiral seeder do the job 【Spiral Drill Size】 8cm diameter x 30cm length (3.1inch x 11.8inch) planter bulb with non-slip hex drive, works with 10mm (3/8) drill ") or more. 【Compatible】 Use 18V or higher low speed (slow) speed drill, drill into applicable soil or landscape straight for 30cm and lift out of hole; For cordless drills, a 14V minimum drill is recommended. 【Perfect for】 Suitable for professionals and home DIY projects, planting flower bulbs, bedding plants, clods and nursery seedlings, fertilizing shrubs and trees for ventilation in deep water and even weed and root removal. Garden Spiral Drill Bit for Making a Hole to Plant Trees, Shrubs Ø 80 × 300mm Features: 1.Made of premium manganese steel with a gloss black painted finish, the professional garden auger is very strong and durable for extended use. 2. Easily dig most types of soil, even clay and rocky soils. Makes planting jobs much easier and faster, save your back and let the spiral seeder do the job 3.Universal garden soil cultivator tool accessories, work well with any cordless or corded drill with a 10mm (3/8 ") or larger chuck. 4. The versatile cultivator garden hand tool works great for planting bedding plants, bulbs, seedlings or fertilizing shrubs and trees for deep water aeration and more. 5. Save your time when planting umbrellas or poles, termite bait stations, taking soil samples, plant holes or erecting fences. choice of professional landscapers. Specifications: - Material: Stainless steel hexagonal shank - Color: black - Diameter: 8 cm / 3.1 inches - Length: 30 cm / 11.8 inches Package included: 1 x hand drill auger