When I first saw the Pilot Del Ful double knock pencil on JetPens.com I was intrigue. After a bit of confusion about the cost of shipping (I accidentally put Cambodia instead of Canada) I broke down and ordered one. The pencil took about 6 business days to arrive and from the moment I took it out of the packaging I knew this was going to be a fun little toy.
When the pencil tip is retracted the lead stays put then you click the button and now that the tip is out you give the pencil a little shake and a counter weight bounces and extracts the lead. The included lead was fine but nothing special but I didn’t buy it for the lead I bought it for the knock which is so fun. As I was using it my 8 year old son was mesmerized by it and even offered to sit down immediately and do his homework as long as I let him use it. He is now saving his pennies for one of his own.
If you are looking for a good mechanical pencil and also like a little novelty with your written instruments this is a great option.
Check out the Pen Addicts thoughts as well.