
I have many MR16 lamps at home. I've always had issues with the failure rate of lampholders I buy locally; Basically, they don't grip the lamp pins securely, resulting in intermittent operation or no light at all. As we age, this becomes more and more of a problem. These lamp holders hold the lamp posts very securely and solve my main problem. Also, I bought this 6 pack for about the price I paid for one of the others. I had to "reform" the ceramic to fit my mount and that increases the possibility that I could ruin the mount, but that's a minor issue considering how well the mount does its job and the fact that I have five spares with each purchase.