I really like this duo brush by Smashbox. Same unique red handle but one end has a mascara spoolie and the other end is the metal lash comb. So now you only need one brush for mascara! (i like both ends for lashes, prefer spoolie for small clumps and then revert to metal comb if lashes are still clumpy). At $22, it is a decent price for two brush heads!
I have had this brush for awhile and the metal lash combs started falling out. Less than half are left. The damn this is barely useable. I never even washed this brush. What a crappy brush. Skip this one!