33-1 Ratchet Screwdriver Set S2
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Product Description

Premium 33-in-1 ratchet screwdriver set (33合1棘轮螺丝刀套入套装) with S2 steel bits. Includes 1pc ratchet screwdriver (包括口螺丝刀), 28pcs bits (6.35*25mm) - PH1, PH2, PH3, PZ1, PZ2, PZ3, H3, M4, H5, H6, SL3, SL4, SL5, SL6, T10, T15, T20, T25, T27, T30, plus 12pcs metric nut setter bits (12支六角螺母套): 5mm, 6mm, 7mm, 8mm. S2 material with phosphating black finish and double ring. TPR+PP handle.6 sets/inner box, 48 sets/carton.

Material Comparison: CR-V vs S2

Property CR-V (Chrome Vanadium) S2 (Tool Steel)
Hardness Medium (HRC 48-52) Higher (HRC 58-62)
Toughness Higher - more flexible Lower - more brittle
Wear Resistance Good Excellent
Price Standard Premium
Best For General use, everyday tasks High-torque, professional use

CR-V: More affordable, good balance of hardness and toughness. Less likely to snap under stress but will wear faster. Great for DIY and general use.

S2: Harder steel, better wear resistance, holds its shape longer under high torque. Preferred by professionals who need precision and durability.

Specifications

Material & Construction

Material: S2 Surface Treatment: Phosphating black with double ring Handle Material: TPR+PP

Technical Information

=== Product Specifications === Pieces: 33-1 PCS Head Types: 1pc Ratchet screwdriver, 28pcs Bits (6.35*25mm): PH1,PH2 PH3, PZ1 PZ2 PZ3,H3 M4 H5 H6,SL3 SL4 SL5 SL6,T10 T15 T20 T25 T27 T30, 12pcs Metric Nut setter Bits: 5mm 6mm 7mm 8mm Material: S2 Surface Treatment: Phosphating black with double ring Handle Material: TPR+PP

33-1 Ratchet Screwdriver Set S2

Select Specifications

φ(d)=Cutting Diameter | R=Radius | D=Shank Diameter | I=Cutting Length | L=Overall Length | All in mm

D=Diameter | L1, L2, L3=Length Dimensions | L=Overall Length | D1=Shank Diameter | All in mm

Select blade width, groove depth (T), and working radius range to find the right Face Groove tool

Select boring diameter range, shank diameter (D), and insert type (C=diamond/T=triangular) to find the right boring head

Select CBA model (complete boring range) and internal boring range to find the right micro finish boring head

Select LBK model (matches your CBA boring head) and extension length to find the right extension rod

Select BT type (spindle taper), LBK number (locking block socket), CBA head model, and projection length (L1) to find the right boring head shank

How to Choose the Right Holder

  • Shank Height (H): Choose based on your machine's tool holder/turret slot size
  • Tool Height (H3): Must match the H dimension of your SPB Tool (26mm or 32mm)

Example: If you have SPB26-3 tool (H=26mm), select H3=26mm

Must match your SPB Tool's H dimension

HRC≤56 is recommended for best price/performance ratio with newest nano-black coating technology.

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Blade Width Groove Depth (T) Radius Range Compatible Insert

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Width (W) Height (H) Other Dimensions Insert/Accessories

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SKU / Article Number

φ(d)
I
H7
D
L
Morse #

Price per piece

30% Discounted price

D (Diameter)

L1

L2

L3

L (Overall)

D1

Insert Code

Insert Count

h

b

H

F

L

L1

f

Insert

Blade Width

Blade Height

Groove Depth

Orientation

Working Radius Range

Compatible Inserts

φ(d)

R

D

I

L

Morse #

H7 Tolerance

Stock: pcs

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