This set includes security bits for tamperproof screws. It features 9 Security Star Bits, 6 Security Hex Bits, and 4 Security Hex-Metric. Additional bits include 4 Spanner Bits, 4 Tri-Wing Bits, 3 Clutch Type G Bits, and a Bit Tip Holder. Price drops from $19.98 to just $14.98. Shipping is free for prime members or on orders over $35.