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Angled Rotary Porting Handpiece Kit – Lucky Dog Manufacturing
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Amazon.com: Rotary File, Rotary Bit Set, port and polish kit cylinder head aluminum porting kit 6pcs Tungsten Carbide Aluminum Rotary Files Burr Set 6mm Shank 10mm Cutting Diameter with High Abrasion Resistance :
2 stroke porting and polishing kit with 90 degree porting tool