Professional Industrial Tools
GERVA Heavy-Duty
Chisels & Drill Bits
Built for Strength, Engineered for Precision
Zhejiang Jiemai specializes in electric hammer chisels, pneumatic components, and industrial drill bits — manufactured with premium imported spring steel and hardened alloy tips for superior performance.
Who We Are
About Zhejiang Jiemai
Zhejiang Jiemai is a leading manufacturer and exporter of standard and heavy-duty demolition attachments, operating under the trusted GERMA and GERVA brands. We serve construction professionals and industrial distributors across the globe.
Our products leverage advanced metallurgy — combining high-carbon spring steel with precision heat treatment — to deliver exceptional torque resistance, fatigue life, and impact energy transfer in the most demanding construction and excavation environments.
Based in Yiwu, China, we combine scale manufacturing with meticulous quality control to supply reliable, cost-effective tooling solutions to wholesale partners worldwide.
What We Make
Our Professional Catalog
High-Impact Tools For Every Shank Standard
SDS Plus & Square Shank Chisels
Designed for light-to-medium demolition tasks. Compatible with most rotary hammer drills, offering excellent precision and durability for everyday construction work.
Inquire NowWhat We Offer
Manufacturing Excellence
Supporting Global Demands
OEM/ODM Hardware Customization
We offer full OEM and ODM capabilities, enabling partners to develop branded product lines with custom specifications, markings, and packaging.
High-Volume Supply Chain Distribution
Our distribution network supports global wholesale demand with reliable lead times, bulk pricing tiers, and streamlined logistics solutions.
Metallurgical Quality Testing
Every batch undergoes rigorous metallurgical testing including hardness verification, tensile strength analysis, and fatigue resistance protocols.
Technical Asset Assistance
Our technical team provides consultation on tool selection, application guidance, and after-sales support to maximize performance in the field.
Work With Us
Partner With Us
Get a Custom Wholesale Quote
Get In Touch
We work with wholesale distributors, construction firms, and OEM partners worldwide. Reach out to discuss bulk pricing, custom branding, or technical specifications.