Park tool threadless saw guide sg6the sg 6 threadless saw guide ensures a straight clean cut on 1 1 18 and 1 1 4 threadless forks simply clamp the sg 6 onto the fork and cut letting the sg 6 guide the hacksaw blade the sg 6s non scratching composite body incorporates steel threads and a steel reinforcing plate to withstand the rigors of heavy shop use notesg 6 is intended for use with a steel hacksaw blade buypark tool workshop toolsfrom chain reaction cycles the worlds largest