Some inferior straps are so elastic your load sways all over the place. Not the case with these draper straps because they are excellent. The rest of the ratchet is more than up to the job to.
If you are not sure how to use these or any tie down straps, have a look on you tube for a demo. I would NOT recommend cutting down these or any tie down straps, because they can't be too long, but they could end up being too short. The excess won't stop you winding on if you do the following. You will be folding your strap then feeding it into the ratchet still folded. Thread through the ratchet and leave some poking out the other side (this helps keep the trap in place as you wind on top of it). As long as you achieve at least a couple of winds before things get tight you will be fine. Remember to fold closed to lock you ratchet system for extra security. Now it is Usual to have some/lots of excess strap left over not wound on to ratchet. Just tie this to one side you may need it on another type of job at a later date. To release, put two fingers on the release (one each side of the spring) then straighten out the ratchet arm fully. This will remove the ratchet part of the mechanism, allowing your strap to unwind freely. (If you can remove some of the load tension on the strap before the release, it will release a bit smoother). It is possible safely remove tension one click at a time by using the release to open the arm half way then lever a little (without the release pressed) a little to remove tension on the ratchet then use your thumb to pull down the lock part of the mechanism (also has a spring) then you can back it off one tooth at time and repeat if necessary. It sounds long winded but with a little practice it just takes seconds. It's wise to Practice with these before you really need them for the first time.