The SG-6 Threadless Saw Guide ensures a straight, clean cut on 1" (25.4mm), 1-1/8" (28.6mm) and 1-1/4" (31.75) threadless fork steerer tubes. Also works great when cutting handlebars or other round tubes from 22mm to 33mm. Simply clamp the SG-6 onto the tube 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.