Powershell for SharePoint item level security

itemsecurity.ps1

$listWeb = Get-SPWeb -Identity $url
$lst = $listWeb.Lists.TryGetList($listName)
if($lst -ne $null)
{
	#Read all items = 1. Read items that were created by the user = 2
	$lst.ReadSecurity =2
	#Create and edit all items = 1. Create items and edit items that were created by the user =2
	$lst.WriteSecurity =2
	$lst.NoCrawl = $true;
	$lst.EnableAttachments = $false;
	$lst.Update();
}

No CSOM available as of now.