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10pc Expanding Jam Chuck System. Numerous turning projects require a 'jam chuck' - however hand turning the chuck is time consuming and not always accurate. This system solves the jam chuck problem. Insert the system's tough rubber chuck into your work, then expand it by turning the nut to completely secure the workpiece. This remarkable package includes 5 chucks plus the Forstner bits to drill the jam chuck holes. Chuck and bit sizes are: 3/4", 1", 1-1/4", 1-1/2" and 2"
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