Zoom icon Click to expand Tap to zoom Chevron down icon Chevron down icon Tube Holders by Grobet Sale $59.20 | / SKU 53-150 1 2 3 4 5 6 7 8 9 10+ Quantity Chevron down icon Quantity Add to cart Spinner icon Notify me when back in stock Email address Email me when available Tube Holders Seven collets, ranging in size from 1/32" to 1/4" (0.8 to 6mm) firmly hold tubes for stone setting without collapsing. Collets fit into wood handle with screw chuck.