Advice Needed For Trap Development

[the mechanic]

dumbell shrugs,straight up (no rotation)...until they are level with your ears, now hold for a count of 2 seconds (squeezing the whole time), down slowly and up slowly, again.... high squeeze with a 2 second hold......do as many as you can that way then when you can't squeeze 'em any longer do them regular speed
until fatigue......3-4 sets and your done!!!!

..... [/B]

Exactly !!! I have found nothing better.