Used for concrete core drill bits with 5/8-11 thread to be extended 12 in. and their multiples. 5/8-11 female to 5/8-11 Male. Can fit our Longbuddy concrete core bits with diameters smaller than 1-5/8 in.
- 5/8-11 female to 5/8-11 male
- Core bit extension
- Can fit concrete diamond core bits and all other core bits with 5/8-11 thread
- Can fit all other diamond core bits with 5/8-11 thread






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