It is just a sensible understanding of the spot where you wish to install the block.Installing Harken blocks to your boats is not a very difficult task to do but doing it rightly ensures the ease of use. You do not have to be a master of physics to proceed for mounting the block accurately. It is one among the important safety steps taken to secure your boat. In this way, your boat will be ready to deal with any amount of hiccups. The load factor is different for different boats because the size, shape and structure of the boats are dissimilar. Firstly, fasten the screws along with the sealant inside the hole, which will give firm hold to the screws. Check twice before you make a drill because a wrong hole made will spoil the show of your boat. Match them accurately and equidistantly with each other. To install Harken blocks you need sealant, drill machine, bolts, fender washers, backing plate and lock nuts. Secondly, a backing plate and washers must be used to give a strong hold to the whole block. Lastly, to make the whole system of Harken blocks fool proof you must use lock Double needle driver nuts. Make the correct drills according to the holes provided in the block. It must be placed at the right spot to enable maximum use in accordance to the load factor. All the above hardware will enable you to firmly fix up the block. Fixing Harken blocks need a sound judgement of the load factor and angle of deflection. Make drills on the right places after measuring correct distances between them. These are the most basic factors affecting a proper installation of the block. Now, fixing Harken blocks in an exact way involves the use of hardware materials. Keep the angle of deflection in mind and imagine the ease of use it can provide.