The SG-6 Threadless Saw Guide ensures a straight, clean cut on 1, 1-1/8, & 1-1 4 threadless forks. Simply clamp the SG-6 onto the fork & cut, letting the SG-6 guide the hacksaw blade. The SG-6’s non scratching composite body incorporates steel threads & a steel reinforcing plate to withstand the rigours of heavy shop use. NOTE: SG-6 is intended for use with a steel hacksaw blade. For use of the diamond type blade use the SG-8 Threadless Saw Guide