I know many will disagree with me, and say that these pencil kits are not very good but, I have had good success with the Slimline Titanium Nitride Pencil Kit from PSI. http://www.pennstateind.com/store/PK-PCLA2TN.html. I have used on daily for a number of years now and haven't had any major problems.
Wade
PS... Oh yea, use good quality lead refills (not those from China) and it makes a difference in the lead not breaking.
