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| Specification : | |
| Brand | BAUM Professional Tools |
| Model Code | ART 233 Metric Series |
| Product Category | Double-Ended Deep-Recess Thin-Wall Tubular Box Wrench Spanners |
| Material Base | High-Tensile Cold-Drawn Selected Structural Steel Tubing |
| Thermal Processing | Comprehensive Multi-Stage Hardened & Tempered Curing Cycle |
| Surface Finish Armor | Oil-Repellent Scratch-Resistant Chemical Black Phosphated Coat |
| Drive Internal Configuration | 6-Point Precision Hexagonal Profiles with Deep Hollow Core Clearance |
| Leverage Interface | Dual Transverse Cross-Drilled Holes for Tommy Bar Insertion |
| Available Size Variations | 16x17mm | 17x19mm | 16x21mm | 18x19mm | 20x22mm | 21x23mm | 22x24mm | 24x26mm | 24x27mm | 25x28mm | 30x32mm |
| Application Scope | Deep Tap Nut Extraction, Monoblock Mixer Maintenance, Automotive Spark Plug Servicing |
Premium Selected Steel Tubing Framework: Extruded out of structural-grade carbon steel tubing to yield an ultra-slim, thin-walled geometric footprint that easily clears compact recess cavities.
Full Hardened & Tempered Structural Curing: Undergoes precise induction thermal treatment sequences to maximize tube tensile margins, preventing corner rounding under intense manual leverage.
Industrial Black Phosphated Chemical Barrier: Coated with a high-adhesion conversion finish that seals out garage humidity, engine grease, and harsh chemical solvents to prevent rust tracking.
Integrated Cross-Drilled Tommy Bar Ports: Features factory-aligned transverse handle holes designed to house torque rods for smooth, balanced two-handed lever rotation.
Eleven Dual-Aperture Loose Metric Layouts: Available in standalone space configurations matching light service tasks (16x17mm to 18x19mm), heavy plumbing/chassis repairs (20x22mm to 25x28mm), and industrial machinery studs (30x32mm).