Ratchet straps are assemblies of ratchet buckles with all kinds of straps with or without hooks, endless or not. The straps part of the assemblies can be made of nylon or polyester webbing , and the working load limit should be a few hundred pounds to thousands of pounds , the width of the strap can range from 1” to 4” , the ending of the strap can be a loop, endless, double J hook , flat hook, spring e fitting, snap hook, chain extension,or the ends can have different set up.
The handle of the ratchet buckle have a few varieties, steel handle, aluminum handle or plastic coated handle . Following link is the diagram of long wide handle ratchet :
Ratchet Buckle
Both nylon and polyester webbing are used to make the straps, but they have different characteristics, for shock absorption, we need nylon webbing and for tie down bulk loads we need polyester webbing straps, nylon webbing has better elongation than polyester while polyester webbing are stronger than nylon ones, in real world applications we need varieties, that is to say we need both nylon and polyester webbing straps for different needs .
Webbing cab also be coated with suitable materials that will improve desirable characteristics, such as abrasion resistance, sealing to prevent penetration of foreign particles and matter, increased(or decreased) coefficient of friction, ultra-violet light resistance.
Last but not the least, the quality of the tie down straps is the critical characteristic, to properly and safely use the ratchet straps is a must . Now we need to find low price yet high quality straps. Your local store will probably have most straps you need, but the price to quality ratio probably will be pretty high, but this is not always true . Actually there is a better way to acquire these straps, you guessed it, online stores are probably the best place to find wonderful deals, not most of the time but you will always find what you need, maybe not exactly but it will be close.