Our 5 Pack of QUIK-LOK Arbor Large Thread Adapters are intended to be used with hole saws from 1-1/4" up to a maximum of 2". The threaded design is a universal fit compatible with all industry standard threaded hole saws from 1-1/4" up to 2". Thread size of 5/8" x 18. These adapters are only for use with the Milwaukee QUIK-LOK Hole Saw Arbor System.
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