Increase efficiency by using your knees to lift and lower the presser foot without using your hands. Using your knee to push the lever to the right raises the presser foot and when you return it, it will lower the presser foot

Juki Knee Lifter for HZL-F, G, and DX Series Machines Use with Juki Sewing Machine Models: HZL-F300 HZL-F400 HZL-F600 HZL-DX5 HZL-DX7