Get two bits in one with Stubben's versatile Steeltec 2-in-1 Loose Ring Bit with Sweet Copper Link - whether you need a softer bit or a stronger bit, all you have to do is flip it over. If you look closely at the photo, you'll see that one edge of the bit is soft and rounded and the other has an angled edge. For a soft bit, place the soft edge against the tongue; for a stronger bit, place the angled edge against the tongue. The bit has a "+" sign at one end so you'll always know which side you're using before you mount - when the + sign is visible on the horse's left side, the strong side is in use. The Stubben Steeltec 2-in-1 Loose Ring with Sweet Copper Link is a great bit to have in your arsenal, especially for a horse that periodically needs something a little stronger; use the strong side for a tune-up, and go right back to the soft side to prevent desensitization to the bit.
In addition to the great 2-in-1 feature, this Stubben Steeltec Loose Ring also features a Sweet Copper link; this unique alloy is made from 89% copper, 7% hardened iron + aluminum, and 4% zinc, and does not have any nickel, so there's no chance of allergic reaction. Sweet Copper is durable and has a pleasing taste that encourages salivation and responsiveness.