Shred Pal is a shredder that belongs to Stan Pines.
Shred Pal is also seen in "Bottomless Pit!" during Mabel's "Trooth Ache" story. Dipper sees one of Stan's old tax forums with the words "I have committed tax fraud," written over it. He then reacts to this by shredding it by the machine.
It is an average gray and white shredder with a logo with bold gray letters inside a dark gray rectangle. A dark gray circle is at the middle.