Measuring 18cm long, this tool will help you achieve evenly-spread adhesive to an exact depth of 4mm - a perfect bed for indirect-method mosaic. In my view this is one of the easiest types of adhesive spreaders to use; instead of moving it sideways at an angle, as you should with a professional grout trowel, you simply drag towards you while holding at a 45-degree angle. Made of steel with a black plastic handle.