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Choice of M4, M5, M6 & M8 internal threads. Installed by simply screwing into a correct size hole. M8 inserts require a hole size of 11.1mm - 11.5mm. M4 inserts require a hole size of 5.6mm - 6mm. M6 inserts require a hole size of 8.7mm - 9.1mm.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.