DPAccessories D5110K One Duplex 6 Spline Key/Tool DPAccessories Lug Nuts 13/16" & 7/8" Hex Lug Nut Installation Tool FITS: DP-Accessories Duplex Series 6-Spline Lug Nuts. ALSO FITS: Gorilla Automotive Brand Duplex SD Lug Nuts (1378SD-KEY) SPECS: Dual Hex Sizes 13/16" and 7/8" (22mm). FEATURES: Triple nickel chrome plating to ensure long life by preventing rust and corrosion. Cold forged and heat treated steel for exceptional strength. INCLUDES: One (1) Duplex 6-Spline Installation Tool (Key).