Creating a cuff item

So I would like to make an item called handcuffs and do so you cant cuff a person without them but i dont know where to edit that in and what i should put in. Just point me in the right direction.

In the server I have written :

ESX = nil

TriggerEvent(‘esx:getSharedObject’, function(obj)
ESX = obj
end)

AddEventHandler(‘esx:onAddInventoryItem’, function(source, item, count)
if item.name == ‘Handklovar’ then
TriggerClientEvent(‘esx_Handklovar:LäggTillHandklovar’, source)
end
end)

AddEventHandler(‘esx:onRemoveInventoryItem’, function(source, item, count)
if item.name == ‘Handklovar’ and item.count < 1 then
TriggerClientEvent(‘esx_Handklovar:removeHandklovar’, source)
end
end)