Secateurs (in British English) are a type of scissors for use with plants. They are strong enough to prune hard branches of trees and shrubs, sometimes up to two centimetres thick. They are used in gardening and flower arranging, and in nature conservation where fine-scale habitat management is required.
For large-leaved shrubs a single sharp knife blade might be used instead. Loppers are a larger, two-handed version for thicker branches than pruning shears can handle.