svling m3 metric screw assortment, 2320pcs m3 x 6/8/10/12/16/20/25/30/35mm hex socket button & cap head screws nuts bolts washer assortment kit 12.9 & 10.9 grade black oxide for diy, 3d printer m3 2320pcs button&socket black is up for auction in Tools & Home Improvement. The current bid is $3.50, 83% below the $20.69 MSRP, in As Is condition. This auction has ended — similar items appear in live auctions regularly.