Blades Thru Arm by Daytona Magic - Trick
With the blades laying on the table place your arm through the device. Remove your arm and replace it again. Place the blades into the device, and now you can open the box. Don't forget to wiggle your fingers! All that remains to do is close and latch the box. Remove the blades and show that your arm is restored.
Comes complete with 2 blades, painted wooden box and an instruction sheet.