45 PIECE TOOL SIZES: Ratchet, extension bar, 1/4" spinner handle, spark plug socket, adapter and more COMPATIBILITY: 1/4" and 3/8" dr. socket sizes: 5/32" to 3/4" and 4mm to 17mm PREMIUM QUALITY: Our tool set are all made from premium quality chrome vanadium steel alloy, and its mirror chrome plated finish perfectly achieved outstanding strength and wear resistant. CONVENIENT: Sturdy blow molded storage/carrying case to keep your tools organized. WIDE APPLICATION: Perfect for home improvement, carpentry tools, construction, auto repair, woodwork, and other DIY projects.