EE was using a straight edge to cut a conveyor belt w/box cutter knife. The blade slipped & cut EE's left wrist/forearm. EE was transported to ER by a co-worker. EE had a surgical procedure to repair a torn nerve, tendon, and artery and discharged from ER after surgery. EE is off work for 2 weeks w/a RTW restriction of no use of left hand/arm for 3 months upon return to work.