Originally Posted by maddog34

there's a very high probability that either of those pullers will ruin the bottom bracket threads, and, considering the shape of the area you'd be trying to gain purchase on, would not work anyway, since they would not grab the crank arm in a viable manner. I DO have one that would work if the BB threads were protected by a plug of the correct size.. it has a tapered piece that threads down inside the top of the puller arms and holds them in place on the part being pulled... it is very expensive and one tool in a comprehensive bearing extraction kit.... but once a plug has been created, a regular crank arm puller would work fine, so why bother with the two or three jaw types, fancy clamper style, or not,, eh?