The Saracen Winterhoff is designed specifically to fit the BPW/Winterhoff caravan or trailer hitches including the WS3000, being the perfect fit for this hitch.
You may find some generic hitch locks leave a lot of space around the hitch, causing rattling and leaving them less secure and vulnerable to attack by crowbar.
The Saracen Winterhoff comes complete with a carry bag and security hitch ball.