I use to ride with the Primo Stogies.  My friend always rode with the kink pegs.  He had a anti-roll pin in front.  After a while of of doing double peg grinds with the roll pin he saw that a crack started to form in the front peg The crack was about 2 inches long and it was caused because the pin puts alot of pessure on a certain spot of the peg and then it can make it crack so i never used the roll pins form the start.  I just kept the pegs nice and tight.  The pegs are about four inches long and they are very good peg. They are about a inch and a half wide and they don't fold over like the Primos do and they come with a full lifetime warrenty on them that covers  you if you grind the pegs though on two sides  they will send you a brand new one.  I think these pegs work very good if you only ride ramps it will be the last peg you ever need and for street these pegs will last you about a year or more so if your looking for a safe bet that that will actually last and not fold over the Kinks are the ones for you.