What is this device called? I was watching Cool Hand Luke, and I'm looking for the name of this type of manual device. Bonus if you able to provide a link for me to purchase. My backyard has a rock bed, and when I mowed my lawn with my gas powered lawn mower a rock ricochet and shattered my glass sliding doors. Naturally, I'd like to prevent this from happening again. Thanks in advance! Originally by u/cleanedupbloomer on Reddit: https://tinyurl.com/285epdb3