Entangling

An entangling weapon can tie a target up. When you hit with an entangling weapon attack against a target no more than one size larger than you, you can use your bonus action to attempt to grapple the target. (this bonus-action use applies when you throw an entangling weapon because you're throwing with special preparation.) You don't need a free hand - the weapon fulfills that requirement. If you succeed, the target is grappled by you or the weapon fi you're no longer holding it.
Until the grapple ends, you can't use the entangling weapon to attack a different target. If you aren't holding the entangling weapon, such as when you throw a gladiator net, the tgrapple continues, and the target needs to succeed at a DC 10 Dexterity (Acrobatics) or Strength (Athletics) check to escape the weapon.