An attachment knife is welded to an existing tooth system on the bucket. This has the following advantage: the attachment knife allows layers of earth to be removed straight and evenly. Any cables underneath, for example, are less at risk of being damaged than when using teeth. Nevertheless, the attachment knife can also be removed, and the Backhoe Bucket can be used with replacement teeth in the normal tooth variant.
The other advantages of an attachment knife on the welded tooth system are diverse: