what use are you thinking of for the rope and the come along.
Without knowing particulars have 2 or 3 sizes on hand for different situations. As far as the come along goes I have used the ones with the straps, they are a little safer than the ones that use cables. Either can be used by almost anyone with very little training as long as they use common sense.
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Depend on yourself, help those who are not able, and teach those that are.