TRIPLE SQUARE SOCKET SET: This versatile set features 20 triple square bit set. Triple-square spline socket also known as 12 point bits are ideal for use with tamperproof nuts, cylinder head bolts, and other engine bolts. LONG TORX SOCKET SET: Extra long 4” 12 point socket set reached those hard to get 12 point torx tamperproof or non-tamperproof in your vehicles. HEAVY DUTY SOCKETS: Each piece is made of premium S2 alloy steel for superior hardness that reduce wear-outs and insure longevity. High strength chrome vanadium steel sockets provide superior torque for greater turning power with mirror chrome finish for longevity. SPLINE SOCKET BIT SET: Each triple-square socket is finely crafted and precisely machined for accurate size and features a chamfered end. The precise ends insert smoothly into fasteners and protect the bits and fasteners from damaged edges. INCLUDES: Set includes a sturdy plastic organizing case for secure storage and easy carrying. 10 long bits and 10 standard bits. 1/4", 3/8", 1/2" drives. Sizes ranging from 4mm to 18mm. Tamperproof and standard.