Regarding the GREASE: Since it is metal tool, it has to be coated with lubricating substances to be manufactured. It also helps keep them from rusting. If the greasyeor the smell bothers you, you could just wash them off and re-lubricate them with mineral oil instead.
REAMTOP 39 Shape Style One Hole Hollow Punch Cutter Tool Leather Craft Set DIY For Handmade
Material : Alloy steel Size: as pictures Color: Black
Package includes: 39 x different shape hold punches 1 x plastic case