ULTRA STEEL 66PC Ratchet Screwdriver Set, Bits and Nut Driver

COMPREHENSIVE 66-PIECE SET: Includes 1 ratchet screwdriver, 1 flexible 8.5-inch extension tube, 42 heat-treated CR-V steel 1-inch bits (Phillips, Slotted, Pozidrive, Square, Hex, and Star), 20 nut drivers in metric and SAE sizes, and 2 stubby screwdrivers for versatile applications PREMIUM CONSTRUCTION: All bits and nut drivers crafted from heat-treated Chrome Vanadium Steel for superior strength and durability, with nut drivers rated at 50BV30 hardness for long-lasting performance EXTENSIVE BIT VARIETY: Features Phillips (#0, #1, #2, #3), Slotted (1/8", 5/32", 3/16"), Pozidrive (PZ0-PZ3), Square (S0-S3), Hex (1/8", 5/32"), and Star (T10, T15, T20, T25, T30, T40) bits to handle virtually any fastening task DUAL MEASUREMENT NUT DRIVERS: Includes 20 nut drivers with both metric (7mm, 8mm, 9mm, 10mm, 11mm) and SAE (9/32", 5/16", 11/32", 3/8", 7/16") sizes, each size provided in duplicate for convenience