Grey Pneumatic 1598HC 1/2" Drive 18-Piece Master Combo SAE & Metric Impact Hex Driver Set

Advanced Performance. Built to Last.

Industrial-Grade One-Piece Impact Hex Driving

Conquer both fractional and metric hex fasteners with a single heavy-duty solution: the Grey Pneumatic 1598HC 1/2" Drive 18-Piece Master Combo SAE & Metric Impact Hex Driver Set. Forged using top-tier chrome-molybdenum alloy steel (Cr-Mo), these high-torque drivers are engineered with a premium one-piece construction. Eliminating the weak connection points found in typical two-piece bit sockets, this solid design maximizes structural integrity and ensures direct, optimal torque transfer from your high-powered impact tools.

This comprehensive master combo kit provides dual-spectrum workspace coverage, ensuring you always have the right driver on hand. It features a complete range of fractional sizes from 1/4" to 3/4" (19mm) alongside metric sizes from 6mm to 18mm. Every piece is manufactured to strict industrial tolerances, providing an ultra-precise fit inside the fastener pocket to eliminate cam-outs, rounding, and core twisting under intense stress.

The entire 18-piece collection comes housed in a rugged, blow-molded storage case engineered to handle harsh shop floor environments. Weighing a perfectly balanced 6.81 lbs., this setup keeps your hex drivers perfectly organized, protected, and highly portable.

CRITICAL OPERATING NOTICE: This master set is engineered FOR IMPACT USE ONLY. The professional factory lifetime warranty is valid on individual parts only and will be strictly void if used with hand tools (such as standard breaker bars or ratchets).

Key Features & Specifications

• Complete Combo SAE & Metric Coverage: 18-piece master range including fractional sizes (1/4" to 3/4") and metric sizes (6mm to 18mm).

• Solid One-Piece Construction: Eliminates the vulnerability of separate internal pins or set screws, maximizing strength under severe rotational impacts.

• Premium Cr-Mo Steel Forging: Built from premium Chrome Molybdenum steel for professional durability, maximum fatigue resistance, and long-lasting industrial use.

• Molded Storage Case: Heavy-duty fitted blow-molded case included to keep your drivers organized and highly secure.

• Set Weight: 6.81 lbs.

• Operating Rule: For impact use only.

• Warranty: Protected by a dependable Lifetime Warranty (covers individual parts only; void if used with manual hand tools).