Wrist Blades?!

You may laugh and not believe me....but i acually made a working wrist blades, first i design them from picture and made the first blades out of crad board and my shop treacher was kind another to help me make a pair of steel wrist blades, they are very sharp too. there length is bout 12inchs which is 12 inchs of blade. I used a large cycinder like mechianish to shoot them out then i have to them back use my other hand to retrack them. But there pretty freaking sweet ill try a post a picture if daveberg lets me...! there pretty light too lol. Im just telling you guys this because i thought it was really cool. post you ideas for any other weapons i may be able to make...