Mk2 letterbox shredder has power so watch those fingers Mr Postman. To get a COLINFURZE MERCH click here https://www.colinfurzeshop.com Subscribe for more crazy inventions projects and builds http://bit.ly/2I6f0bv Follow me on Social Media to see what I'm up to before the video is released Instagram https://www.instagram.com/realcolinfurze/ Twitter https://twitter.com/colin_furze Facebook https://www.facebook.com/Colin-furze-521680751253584 Music 1st Track is by "InCircles" and the song i