Contrary to what some are written as commentary, the fastening system of the hedge trimmer (edge) is effective. The first time, we look for a bit and then we discover 2 small "bumps" of the support that will be placed above the two small tabs on the hedge trimmer. But once the 2 pins in place, the hedge trimmer is well maintained. The length adjustment is effective and appears solid (he still little used). The connector that connects the hedge trimmer to the control button on the handle of the support is not waterproof and I have some concerns if the grass is wet with dew. But my first use still revealed nothing on this level. A small downside, however: the system that allows tilting the hedge trimmer lack of stability, especially in rough terrain where, upon impact with sod, it leaves "disorient". So this is a purchase that did.