Judging by your profile, you have a 2000 4x4 ranger.
Your ONLY lift options are:
-tbar crank (just cranking your stock keys) for 1.5-2". Free plus the cost of an alignment
-3" body lift. Cost ~200 bucks plus install.
-4" superlift. Cost ~2,000 bucks plus install
Stay away from aftermarket lift keys or "leveling kits". They are garbage. At their best they do the same thing as a tbar crank (but way more expensive), at their worst they push your front end far beyond what it was designed for.