Chinese Onion planting artifact

Spot products have the following specifications:

MODEL A:    15cm deep (10 teeth, 18 trees planted in 1m)     Hole Middle to Middle  5.5 cm

MODEL B.      15cm deep (12 teeth, 21 trees planted in 1m)     Hole  Middle to Middle 5cm

MODEL C: 15 cm deep (14 teeth, 18 trees planted in 1 meter) ; Hole Middle to Middle 4cm

MODEL D: 15cm deep (14 teeth, 30 trees planted in 1m)    Hole Middle to Middle 3.5 cm

MODEL E: 15 cm deep (16 teeth, 32 trees planted per meter) ; Hole Middle to Middle  3cm

MODEL F:    20cm deep (12 teeth, 21 trees planted in 1m) Hole Middle to Middle 5cm

MODEL G:    20cm deep (14 teeth, 30 trees planted in 1m)    Hole Middle to Middle  3.5cm 

They are all made of stainless steel. The handle can rotate, which is more suitable for all kinds of terrain. The built-in soil pressing device makes the holes clearly visible. The soil blocks do not press the holes, which is convenient for planting onions. It is known as the "artifact of planting onions"