This is a compatible product, not a genuine Snap-on product. Female side Φ6.8, Male side Φ6.7 From the second piece, it's ¥400. Please confirm the size before bidding, as there may be different lot sizes. It can be used as a repair part for the Mac Tools grip keychains I am selling, but there is a large individual difference, so I cannot guarantee compatibility if used for repair. If the male side does not fit well, please replace the female side as well.