DEHUI TOOLSPGM-certified drill bits · since 1985

Buyer's Guides

Drill bit sourcing guides

Written by the factory, not a content agency: how SDS Plus differs from SDS Max, what PGM certification tests, which carbide head to specify, and real MOQ and lead-time numbers.

Anchor hole size chart showing drill bit diameters for wedge, drop-in and chemical anchors

Size Chart

Anchor Hole Size Chart: Drill Bit for Each Anchor

Drill bit sizes for wedge, sleeve, drop-in, chemical anchors, concrete screws and wall plugs from M6 to M24 and 1/4" to 1" — with the hole depth rule, cleaning, and which SDS bit to use.

Updated Oct 24, 2026

Metric and inch drill bit size conversion chart from 3 mm to 40 mm

Size Chart

Drill Bit Size Chart: mm to Inches & Fractions

Metric to inch drill bit chart from 3 to 40 mm with decimal inches, nearest fraction and the real difference in mm — plus the reverse inch-to-mm chart and when a near size is not good enough for anchors.

Updated Oct 24, 2026

SDS Plus and SDS Max hammer drill bits side by side showing the 10 mm and 18 mm shanks

Buyer's Guide

SDS Plus vs SDS Max: Which Shank Do You Actually Need?

SDS Plus (10 mm shank, 4–32 mm bits) runs on 2–4 kg rotary hammers; SDS Max (18 mm shank, 8–40 mm bits) on 5–12 kg hammers. A drill bit factory explains the real differences, compatibility, and how to buy the right mix.

Updated Oct 23, 2026

PGM certification documents for Dehui Tools SDS hammer drill bits and impact drill bits

Certification

What Is PGM Certification and Why Should Drill Bit Buyers Care?

PGM (Prüfgemeinschaft Mauerbohrer e.V.) is the German test mark for masonry drill bits: hole diameter tolerance, carbide tip symmetry, drilling life, continuous monitoring. What it covers, what it doesn't, and how to verify a supplier's claim.

Updated Oct 23, 2026

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Send sizes and quantities — or a photo of the bits you buy today. A sales engineer replies within 24 hours with FOB pricing per size, carbide head options and free sample arrangements.

Have a size list or a photo of what you buy today? Email it to sales@dehui-tools.com or WhatsApp after submitting — we match sizes and quote FOB within 24 hours.

PGM-certified factory · MOQ 100–200 pcs per size · Free samples · Reply within 24h

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