Soil Puncher 12-Hole Seed Spacing Planter

I purchased the Soil Puncher 12-Hole Seed Spacing Planter | Manual Garden Sowing Tool for Even Flower Seeding off ebay in June for the princely price of £2.85

VERSATILE GARDENING TOOL – Ideal for planting a garden, loosening soil, aerating, and transplanting seedlings. Perfect for vegetables, flowers, and herbs like tomatoes, peppers, nasturtiums, and marigolds.
OPTIMIZED PLANT SPACING FOR BIGGER HARVESTS – Creates evenly spaced holes in seed trays or directly in the soil, promoting healthier plants and maximizing your garden’s yield.
DURABLE & EASY TO USE – Made from high-quality, sturdy PP plastic that withstands daily use. The simple press-and-plant design makes it great for beginners and experienced gardeners alike.
ERGONOMIC & COMFORTABLE GRIP – Designed with a smooth, easy-to-hold handle to prevent hand strain, making planting effortless and enjoyable.
 

MULTIPURPOSE & TIME SAVING – Quickly punches multiple holes at once for efficient seed sowing and transplanting, helping you plant more in less time.

Bottom line, it's a Gadget or a Gizmo, a boy toy and I can't resist such things. 

The 12 combes are 20mm apart and the depth is 30mm