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Extra-thick, kinked, phosphor bronze wire gives the hard scrubbing action needed to cut through the toughest crud in your bores. You'll have to push like the dickens, but the results will be well worth it. Bristles are Extra-Thick phosphor Bronze and will not scratch bores. Great for removing stubborn carbon deposits.
SPECS:
Bristles: Extra-thick phosphor bronze.
Shank: Steel, looped and wound.
Overall Length 3.25" (8.255cm)
Threads: 8-32 Male / 54 and 58 Caliber have 10-32 Male Threads