This trains the principles of going with the direction of a grab to change, and of going above the head to protect. It develops the wrist area of the person being grabbed. These drills are usually practised continuously for at least 20 minutes so that the wrists visibly swell up. It develops the sensitivity of the person grabbing, as they learn to differentiate between grabbing skin, tendons, bones, blood vessels, etc.
1. Single grab. Partners stand facing each other in mabu. One partner takes the wrist of the other and turns and lifts it like playing with a sabre. The 'sabre' partner protects the wrist by acting like a sabre. That is, protect the wrist by doing a chuanzhang.
2. Double grab. One partner takes the other's wrist in two hands and steps across with a koubu then rolls to circle the arm fully around, like playing with a sabre. The 'sabre' partner moves sideways along with the circling to keep the arm safe.