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557 (004-557)
028" 844-22FT 22 0
The 7500 series features 3M's Cool-Flow exhalation valve
as well as models 975
corresponding to Twist Drill sizes #80–#71
The 17-Degree Bur Sterling Silver & Yellow Gold Filled 557 (004-557)The 17 degree bur is used to match the standard 17 degree taper found on most round tapered prong and bezel settings to a shank. This solves the problem of having to hand file correct profile on a shank to match a settings profile. Just drill the shank with this bur and the result is a clean, accurate fit with no rocking, no gaps, and in most cases, no need for secondary correction The 17 Degree Bur is engineered to solve one of the most common
US$ 75.60
US$ 123.60
US$ 129.00
US$ 107.60
