This gimmick will enable you to cut the same amount of cards every time from any borrowed deck.  This is made of Brass and has the additional effect of being a "Shiner" on the bottom which will enable you to peek the face of cards and know each card as dealt.  From Jan's Magic.  Includes instructions but they are not entirely accurate as to the effects given as this gimmick does not cut 26 cards as stated in the instructions.  As decks differ in thickness of card stock, this must be taken into consideration and instructions are to be used as ideas for effects you may create.  

Condition this has a small ding on one edge of the mirror side not affecting performance, otherwise fine.