These heads go together like many other name brand heads. The blades fit in three grooves that allow the tip of the blades to slide under the hardened point in the front. This captures the blade at the front. The rear of the blades are captured by the washer like ring that fits over the base of the head where the blades end. Some times the grooves must be cleaned in order for the blades to slide in easily. This is true for virtually all heads that assemble this way. Easily done with point of a pocket knife, etc. The assembled head is then screwed into the arrow shaft where the threaded insert holds the rear of the head together and in place. The retaining ring supplied with the head gives greater strength at the rear of the head and prevents the typical aluminum insert from being damaged by the steel blades from the force of impact. There is no need for any glue to hold the blades in place and the heads should not be assembled prior to the time they are installed on the shaft. There are other heads that allow prior assembly with a screw collar if that is desired. Thunder Heads used to come with a rubber O ring that helped hold the blades in place while being installed although the actual reason for the O ring was to aid in tuning the head to the shaft. If the blades are excessively loose when assembled and the head is tightened to the shaft or the hardened tip of the head is not pressed in tightly to the body of the broad head it is defective and should not be used. Judging from some of the reviews I suspect quality control may be an issue with some of the problems mentioned. There is a plastic tool called a broad head wrench that holds the broad head body while the blades are put in place and the shaft screwed in place. They can be useful if you are having problems holding the components while assembling and they help prevent cuts. If the above steps are confusing I would strongly advise visiting an archery shop and observing how this is done because this is just about as basic as anything in archery. Each assembled head needs to be spin checked for proper alignment to the shaft and very rarely are they properly aligned when first installed. This is true regardless of the brand of the broad head. If this is not done the arrow will not fly true. Spend some time at a shop where they know what they are doing.