The park tool ct32 screw type chain tool is made from investment cast steel because of the tremendous force needed to remove chain pins along with superior strength and durability the ct 3 features a handy ldquoloosening shelfrdquo to remedy stiff links after reassembly the fine thread and comfortable size enable easy removal of even the toughest chain pins like all park tool chain tools it39s easy to use and built to last park tool ct32 screw type chain tool features