These clips take the fear out of breaking your stems when attempting to train your plants to be more productive with bigger yields. Each clip will cradle your stem into conforming into the shape you desire and without breakage IF you are gentle AND do it on only the younger and more supple branches. Older thicker branches require some gentle squeezing first with a slight crushing action to reduce the resistance in the stem to allow a bending motion as you coach the clip into place. Patience with care always pays dividends . Broken stems will repair themselves in a few days if you wrap a piece of painters or masking tape around the break as support to help the plant to complete the repair itself. A large knuckle will appear where the break happened and it will be much stronger than it was before the break.