Print-in-place palm ratchet screwdriver knob

Print-in-place palm ratchet knob (stubby screwdriver handle).

• Print-in-place : Just print, and you are all set. Assembly work is not necessary.
• Durable ratchet mechanism : Tapered ratchet gear makes it not only easy to print but also sturdy operation. Pressure from your palm to the screw effectively aligns and locks the ratchet gear.
• Two types : 1/4inch (6.35mm) hexagonal socket and 3/8inch (9.5mm) square drive.