RY204-Spool-Head-Assembly-5-16UNC-x-1-2in-Right-H&-Thread-Bolt-ALM-Manufacturing-RY204-p-The-ALMRY204-spool-head-assembly-kit-is-compatible-with-a-range-of-dual-line-models-p-p-The-kit-contains-br-1x-Housing-br-1x-Spool-amp-Line-br-1x-Spool-Retainer-Bump-Knob-br-1x-Spring-br-It-is-supplied-with-5-16unc-x-1-2-inch-right-h&-thread-bolt-p-p-The-ALMRY204-fits-Challenge-Xtreme-Ryobi-Craftsman-Toro-trimmer-models-including-p-p-PG-07-34cc-100r-125r-1