Spiked Cesti are simple, sharp melee weapons that are worn around the knuckle that deal 1d6 piercing damage on a hit and have the Adaptable, Attached and Pugilist properties.

Properties

Adaptable
This weapon can be used with differing techniques, allowing it to deal different types of damage. When a creature makes a weapon attack with this weapon, it can choose to deal bludgeoning damage instead.

Attached
You can’t be disarmed of this weapon, but donning or doffing the weapon takes an action. You can use a hand equipped with this weapon to hold items, but can’t attack with the weapon while doing so. Additionally, you have disadvantage on attack rolls using other weapons held in a hand equipped with this weapon and on Sleight of Hand checks using the hand that is equipped with this weapon.

Pugilist
For creatures that roll a die when they make unarmed strikes (such as the monk), the size of their damage die is increased by one (maximum 1d12) when they make unarmed strikes with a hand equipped with a weapon that has this property.

Superior Strike

Flurry.
In a blistering display of speed, you make a number of unarmed strikes equal to 1 plus half your proficiency bonus (rounded down) against creatures within your reach. Each unarmed strike must be against a different target. You then gain a +2 bonus to AC until the start of your next turn.