Alloy Bar Ends is what you need if you keep on ripping your plastic ones. Running nothing on your bar ends is asking for trouble. Make sure you cover it up. Here's an option from Snafu:
-Cold forged alloy ends with laser etched SNAFU icon
-Matte Purple, Black, Silver, Orange ano finish
-Grade-8 Allen cap hardware with threaded alloy nut
-Cast two-piece alloy wedge mechanism holds tight and square