This large hand-held maxi 1 soil blocker is manufactured in the UK by Ladbrooke. It produces a single 4" cube soil block, that can be the final stage for your 3/4" and 2" soil blocks, or it can also receive large or small seeds. Use this soil block to produce a large 4 inch block that will accept a 2 inch block created by the Medium 4. Good for tomatoes or for plants started very early which need a good sized root ball. Simply push the device into a wet soil mix, and eject the cube using the hand squeeze. A fantastic tool for small farms or any situation that calls for heavy seeding. This model's pin is built in, and not interchangeable.