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HSS Step Drills Bits Set for Metal, 4-12mm, 4-20mm, 4-30mm
US$3.20
10-99 Pieces
US$2.40
100+ Pieces
Sample price:US$2.40/piece.Request sample
Product profile
Customization
AvailableCustomized
CustomizedStandard
DINModel NO.
354-50xxLength
Jobber-lengthType
Step DrillsMaterial
High Speed SteelUsage
Metal DrillingSize
4-12mm, 4-20mm, 4-30mmCoated
Tin-CoatedDelivery
1 MonthPackage
Wooden Case, Plastic CaseTransport Package
Plastic or Wooden CaseSpecification
DINTrademark
Neutral or OEMOrigin
ChinaProduction Capacity
10000 Sets/MonthKey features
High Speed Steel Material: Made of high quality HSS or HSS Tin-Coated for strong and durable performance.
Multi-Size Options: Available in 4-12mm, 4-20mm, 4-30mm, 6-18mm, 6-33mm, and 6-42mm configurations.
Customized Sizes Available: Individual sizes and special sizes can be supplied according to customer requests.
Efficient Cutting Design: Features 2 fluted edges for faster, smoother cutting and 3 sided shanks to prevent slippage.
International Standards Compliance: Products strictly adhere to DIN, ISO, ASNI, BSS, and JIS international industrial standards.
Flexible Packaging: Packed in wooden case, metal case, or plastic case based on customer preference.
Prompt Delivery Capability: Standard items delivered within 30 to 45 days; nonstandard items supported by production unit.
Sample Availability: Samples available for evaluation at cost plus shipping, deductible from future order deposit.
Company profile

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 1993-05-07Nearest Port: Qingdao, ShanghaiAverage Response Time: >24hTerms of Payment: T/T, PayPal, Western Union, etc.International Commercial Terms(Incoterms): FOB, CIF, EXW
AI-Powered supplier vetting
SummaryQingdao Preco Imp. & Exp. Co., Ltd. is identified as both a trading company and manufacturer/factory in Qingdao, China, with eight production lines, 11–20 years of total R&D-engineer experience, and 6–10 quality-control staff. It reports carbide-burr production of 350,000,000 pieces and exports representing 90% of total sales, with exporting activity recorded since 1993. The supplier states that it accepts processing trade and offers products supported by CE and GS certificates; several management-system certifications are also listed, although the records do not specify certification scope or validity. Its product range covers cutting, measuring, and hand tools, machinery, machine accessories, and work equipment. Evidence supports production, export, and customization-related capabilities, while after-sales capability, financial credibility, and customer cases remain insufficiently documented.
Supplier typeThe supplier is explicitly classified as both a Trading Company and Manufacturer/Factory, while another record describes its company nature as a trading company. Its stated product portfolio spans cutting tools, measuring tools, machinery, machine accessories, hand tools, and work equipment, indicating a combined trading and manufacturing profile, though the exact products manufactured in-house are not specified.
CertificationsThe supplier states that it can supply products with CE and GS certificates and lists ISO 9000, TS 16949, ISO 9001, ISO 22000, BS 25999-2, ISO 20000, and EICC under management-system certifications. The records do not provide certificate numbers, issuing bodies, covered sites or products, or validity dates, so the breadth and current status cannot be independently assessed.
R&D capabilityThe supplier reports 11–20 years of total experience among its R&D engineers and describes a professional technology team. It also offers machine tools, cutting tools, carbide inserts, and solid carbide tools, but the slices contain no evidence of patents, proprietary designs, new-product development results, or measurable R&D investment.
Production capacityThe supplier reports eight production lines, 6–10 quality-control staff, and annual carbide-burr output of 350,000,000 pieces. It is identified as both a manufacturer/factory and trading company, and its products include cutting tools and related equipment; however, capacity for products other than carbide burrs is not specified.
Customization capabilityThe supplier explicitly states that it accepts processing trade in addition to offering ready products. This directly supports a customization or contract-processing capability, although the records do not define the customization scope, minimum order requirements, tooling support, or quality-approval process.
Product Q&A
Q:Which international industrial standards you are offering?
A:
Our products strictly adhere to most international industrial standards such as DIN, ISO, ASNI, BSS and JIS requisitions.
Q:What is your delivery schedules?
A:
For standard items, most delivery will be normally within a 30 to 45 days' time frame on confirmation of the order. Nonstandard items will be some delay but we will try to shorten it from the support unit to meet customers' expectations.
Q:Are samples available?
A:
Samples are available for evaluation at cost plus shipping charges by courier payable in advance. This is only applicable to small items by express courier within 7 days. The amount will be deducted from the 30% advance on confirmation of the order.
Q:Are there any warranty for your products?
A:
Regarding any quality issue, we would deal with it immediately. Please give us a report of the problem accompanying with photos indicating the defective area. We advise our customers to check all items on receipt and if there are any defects through manufacturing faults it will be a one to one replacement in the next coming shipment.
Send Inquiry
*To:
Qingdao Preco Imp. & Exp. Co., Ltd.
Qingdao Preco Imp. & Exp. Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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