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

DongCheng 37 PCS Precision Screwdriver Set (HD092503)

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