20PC HEX BIT SET & ALLEN WRENCHES SETS: Hex bit set delivers 10 SAE（ 5/64”,3/32”, 7/64”, 1/8”, 9/64”, 5/32”, 3/16”, 7/32”, 1/4”, 5/16”) and 10 Metric (1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 5mm, 6mm, 7mm, 8mm) CNC S2 steel bits. 4" magnetic hex shank accesses deep engine bolts with anti-strip torsion control. Ideal for allen wrenches sets in automotive and machinery applications LONG HEX BIT SET - EXCEPTIONAL IMPACT TORQUE RESISTANCE: Long hex bit set absorbs heavy loads via heat-treated S2 alloy and manganese coating. Engineered for allen wrenches sets for impact driver with exceptional durability. Non-slip hex grip prevents breakage in construction and auto frames. METRIC HEX BIT SET WITH DEEP EXTENSION: Metric hex bit set pairs 4" shaft + 2.3" extension (6.3" total) for tight plumbing and electronics. Magnetic tips secure screws effortlessly. Combines with allen bit set for universal 1/4" impact compatibility PRACTICAL HEX DRILL BIT SET ORGANIZER: Anti-slip case with labeled slots protects hex drill bit set during transport. Quick size identification for mechanics & DIYers. Enhanced rust-proof coating supports long-term storage in humid environment DURABILITY OPTIMIZED BLUE HEX BITS: CNC-machined blue hex key bits resist stripping under heavy use. S2 alloy steel construction delivers exceptional durability. Engineered impact allen bits provide reliable performance for demanding mechanics