The DongCheng HD092503 37-Piece Precision Screwdriver Set is a specialized micro-fastening toolkit designed for electronics repair technicians, smartphone technicians, watchmakers, and precision instrument maintenance. Manufactured from high-tensile Chrome Vanadium (CR-V) alloy steel, each 4x28mm micro bit undergoes precision machining and heat treatment to ensure edge retention and prevent cam-out during delicate servicing tasks.
This set provides extensive coverage with 35 micro-bits across standard and security formats, including Slotted, Phillips, Torx, Hex, Tri-Wing (Y-Type), Spanner (U-Type), Pentalobe (Five-Star), and Round pin profiles. It comes complete with a 4mm hex precision driver handle featuring an ergonomic contoured grip and a 4x60mm hex extension bit holder for reaching recessed screws. Neatly housed in a durable plastic storage case, it is an essential toolkit for modern electronics maintenance.
Key Features
- Comprehensive 37-Piece Toolkit: Includes 35 PCS 4x28mm precision bits, 1 PC 4x60mm extension bit holder, and 1 PC 4mm hex precision handle.
- Industrial CR-V Steel Bits: Hardened Chrome Vanadium alloy resists wear, stripping, and tip rounding under intricate torque.
- Electronics & Security Drive Profiles: Features Pentalobe (Five Star 0.8 to 2.0), Tri-Wing (Y2.0, Y3.0), Spanner (U2.0, U2.6), Torx (T4 to T9), Hex, and Round pin bits.
- 4x60mm Extension Holder: Adds reach for accessing fasteners located deep inside narrow electronics enclosures.
- Ergonomic Precision Handle: 4mm hex drive handle provides non-slip tactile control for delicate fingertip manipulation.
- Protective Storage Case: Molded plastic organizer keeps all 35 bits and accessories labeled, secure, and ready for workbench use.
Applications
- Smartphone disassembly, tablet repairs, and mobile device screen replacements
- Laptop hardware servicing, gaming consoles, drones, and computer peripherals
- Eyeglass frames, watch movement maintenance, and fine jewelry assembly
- Precision camera equipment, optical sensors, and instrument calibration
Technical Specifications
| Parameter | Specification |
| Brand | DongCheng |
| Model Number | HD092503 |
| Tool Type | 37-Piece Micro Precision Screwdriver Bit Set |
| Material | Chrome Vanadium (CR-V) Steel |
| Bit Dimensions | 4 x 28 mm (35 PCS) |
| Slotted Bits (7 PCS) | SL1.0, SL1.5, SL2, SL2.5, SL3, SL3.5, SL4 |
| Phillips Bits (4 PCS) | PH000, PH00, PH0, PH1 |
| Torx Bits (6 PCS) | T4, T5, T6, T7, T8, T9 |
| Metric Hex Bits (7 PCS) | H0.7, H0.9, H1.3, H1.5, H2.0, H2.5, H3.0, H4.0 |
| Specialty Bits (11 PCS) | Y2.0, Y3.0, U2.0, U2.6, Five Star 0.8, 1.2, 1.5, 2.0, Round 1.0, Round 1.5 |
| Bit Holder Included | 1 PC Hex 4 x 60 mm |
| Handle Included | 1 PC Precision Screwdriver Handle (Hex 4mm) |
| Packaging Type | Packed by plastic box |
Size/Model-wise Table
| Model | Total Items | Precision Bits | Bit Size | Accessories Included | Material | Packaging |
| HD092503 | 37 PCS | 35 PCS (SL, PH, T, H, Y, U, Five-Star, Round) | 4 x 28 mm | 1x Handle (Hex 4mm), 1x Holder (4x60mm) | CR-V Steel | Plastic Box |
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