Shaviv 153-29001 C Blade Holder has an internal #10 UNF thread to receive either C-40 or C-42 triangular scraper. Can be extended up to 3 1/2″.
Micro Finishing, Shaviv Deburring Tools by Vargus
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Shaviv 153-29001 C Blade Holder
Shaviv 153-29001 C Blade Holder
$9.30
TSVD-30 "C" Mount Video Adapter
Shavi 153-29002 D Blade Holder 



