If you would describe your horse as something with the following;

• Can be heavy and numb in the contact.
• On/Off the bit

Jacob is a Double-jointed Roller bit in Grey Sweet iron.  

Sweet iron will encourage a horse to take the bit and carry it correctly.

The Roller gives the horse something to play with and is a very good option if the horse can feel stiff and get stuck in the connection.

Competition Approved

Normal in size, are you between sizes, go up.