The park tool sg 8 is specially designed to accommodate wider carbon specific saw blades the sg 8 threadless saw guide ensures a straight clean cut on 1 254mm 1 18 286mm and 1 14 318mm threadless fork steerer tubes also works great when cutting handlebars or other round tubes from 22mm to 33mm simply clamp the sg 8 onto the tube and cut letting the sg 8 guide the hacksaw blade the sg 8rsquos non scratching composite body incorporates steel threads and a steel reinforcin