Standard hexagon socket; Socket part is nickel chrome plated surface treatment; Tightening work with hex hole bolts, hex hole set screws; Insertion angle: 0.5 inches (12.7 mm); Socket contents: Hexagon: 4, 5, 6, 8, 10, 12, 14, 17; Screwdriver socket: [[-]6, [[+]No. 2; Handle Contents: Ratchet handle (LVR42. 2), Extension Bar ( VE0415; Set Contents: 12; Made in JIS Display Certified Factory; Chrome Vanadium Steel (Cr-V); Surface Treatment: Nickel Chrome Plating.