Is Grappling Hook legal in Standard, Modern, and Commander?

Grappling Hook is legal in: Modern, Legacy, Vintage, Commander.

Grappling Hook

Q: What type of card is Grappling Hook?

Grappling Hook is an Artifact — Equipment. Its oracle text reads: "Equipped creature has double strike. Whenever equipped creature attacks, you may have target creature block it this turn if able. Equip {4} *Part tool, part weapon, part of the kor.*"