13-Pc M35 Cobalt Drill Bit Kit — Precision-Ground, 135° Split Point, Auto Repair / Stainless / Metal

Designed for real shop workloads, this 13-piece M35 cobalt HSS (≈5% Co) kit combines a 135° split-point with precision-ground flutes to start fast, drill true, and last longer in stainless, carbon & alloy steels, and cast iron. Jobber-length, round-shank bits fit any 3-jaw chuck (corded, cordless, drill press). A compact metal index case keeps sizes organized for grab-and-go efficiency in the bay or on the road.

Why technicians choose it (merged highlights)

Built for tough metals: M35 cobalt maintains hot-hardness in 304/316 stainless, carbon & alloy steels; fewer change-outs, cleaner holes.

Fast, clean starts: 135° split point is self-centering, resists walking on curved/painted panels, and lowers thrust at breakthrough.

Run true, evacuate chips: Precision-ground flutes improve concentricity and chip flow for rounder holes and better finishes.

Shop-friendly set map: 13 essential inch sizes cover common pilot/clearance/tap-drill prep used across brakes, body & under-hood jobs.

Ready for daily use: Jobber length, round shank, and a labeled steel index box speed selection, storage, and inventory.

High-Intent Applications (search-optimized)

Drill out broken studs/bolts, exhaust manifold & bracket holes, frame/chassis work

Stainless steel drilling, sheet-metal & panel repair, and tap-drill preparation

Automotive MRO & fabrication · HVAC/Electrical panels · Mounting holes & accessory installs

Product Specifications

Inch Size Map with Overall Length (OAL) & Flute Length (FL)

Speed & Feed Quick Guide (rule-of-thumb)

Packaging & OEM (wholesale-ready)

Retail-ready metal index case (sleeved & barcoded); master cartons for distributors

Private label/OEM: custom assortments (metric/imperial), finish options, laser-etched logo, EN/RU bilingual labels & spec sheets

FAQ

Will these drill stainless reliably?
Yes—M35 cobalt + 135° split point are engineered for stainless. Use lower RPM, cutting oil, and peck cycles.

Impact-driver compatible?
Round shank bits are for 3-jaw chucks. Hex-shank cobalt variants available on request.

Can I get tap-drill or metric-specific maps?
Absolutely—OEM assortments tailored to common automotive tap sizes or metric ranges are available.

Can they be resharpened?
Yes. Regrind while keeping the split-point geometry; M35 grinds cleanly and holds an edge.

Jiangsu Xing Rui Precision Tools Co., Ltd. is a leading manufacturer of high-quality cutting tools in China, established in 2008 and located in Danyang, Jiangsu Province—a major hub for cutting tool production with convenient transportation for global logistics.

Main Products

We specialize in precision cutting tools and accessories for industrial, construction, metalworking, and woodworking applications. Key product categories include:

• HSS Twist Drill Bits, SDS Drill Bits, and Woodworking Drill Bits
• HSS Machine Taps, Hand Taps, and Spiral Flute Taps
• Hole Saws, End Mills, TCT Hole Cutters, TCT Saw Blades, Diamond Saw Blades
• Drill Bit Sets, Taps & Dies Sets, Screwdriver Bits

Manufacturing Capability & Customization

• Over 90 CNC machines for high-precision production
• OEM & ODM services
• Support for special sizes and non-standard tools
• Strict quality control ensures dimensional accuracy and cutting performance

Global Market

Our products are exported to North America, Europe, South America, the Middle East, Southeast Asia, and Australia, serving tool brands, distributors, wholesalers, and industrial buyers worldwide.

Why Choose Xing Rui

• 18+ years of experience in cutting tool manufacturing
• Complete product range covering multiple applications
• Stable quality control system
• Competitive factory-direct pricing
• Support for small and large orders
• Fast production and on-time delivery

Partner with Xing Rui for reliable cutting tool solutions and long-term global business growth.