The Fein Cordless Multi Master AMM 500 Plus Top 4 Ah AS N00 71293861000 is a professional 18V cordless oscillating MultiTool designed for rapid and precise work in interior construction, renovation, repair and installation applications. With its powerful motor, StarlockPlus tool mounting and extensive accessory package, it provides excellent versatility for cutting, sanding, scraping and tile-removal operations.
The MultiMaster delivers an adjustable oscillation rate of 11,000–18,500 oscillations per minute, allowing the user to select a suitable operating speed for different materials and applications. Its 2 × 1.7° oscillation angle provides controlled accessory movement for precise cutting and sanding.
The StarlockPlus tool holder transfers power efficiently to the accessory, helping maximise cutting performance and precision. The patented QuickIN tool-free clamping system enables accessories to be changed in less than 3 seconds, reducing downtime when switching between applications.
The integrated anti-vibration system helps provide comfortable operation by minimising vibration and improving working conditions during extended use. The Tacho generator maintains a consistent speed under load, while infinitely variable electronic speed control allows the operator to adapt the tool to the material and task.
A durable all-metal gearbox is designed to withstand demanding workloads and provide long service life. The mechanical interface also supports stationary operation in a table or drill-jig holder and can be used for securing a depth stop.
The tool uses the 18V AMPShare battery platform and is compatible with AMPShare / Bosch Professional 18V batteries. Electronic Cell Protection (ECP) helps protect the battery from overload, overheating and deep discharge, while COOLPACK technology supports longer battery life and extended operating periods.
This Top 4 Ah package is particularly well equipped for professional users, including 2 × 18V 4Ah Li-ion battery packs, GAL 1880 CV AS rapid charger, multiple E-Cut saw blades, carbide accessories, sanding accessories, dust extraction device and L-BOXX 136.
Product Features
- 18V cordless MultiTool for professional renovation and interior work.
- Powerful and efficient DC motor designed for demanding applications.
- Variable oscillation speed of 11,000–18,500 OPM.
- 2 × 1.7° oscillation angle for controlled cutting and sanding.
- StarlockPlus tool mounting for efficient power transmission.
- Patented QuickIN tool-free accessory changing system.
- Accessory changes in less than 3 seconds.
- Access to approximately 100 FEIN Starlock and StarlockPlus accessories.
- Anti-vibration system for improved operator comfort.
- Tacho generator maintains constant speed under load.
- Infinitely variable electronic speed control.
- Durable metal gearbox for high-load applications.
- Mechanical interface for stationary operation and depth-stop applications.
- Electronic Cell Protection (ECP) against overload, overheating and deep discharge.
- COOLPACK technology helps extend battery service life.
- Compatible with 18V AMPShare / Bosch Professional batteries.
- Battery charge level can be read directly from the battery.
- Supplied with 2 × 18V 4Ah Li-ion battery packs.
- Includes GAL 1880 CV AS rapid charger.
- Includes multiple cutting, scraping, rasping and sanding accessories.
- Supplied with L-BOXX 136 tool case for organised storage and transportation.
Product Specifications
| Specification | Details |
|---|---|
| Brand | Fein |
| Product Type | Cordless Oscillating MultiTool |
| Model | AMM 500 Plus Top 4 Ah AS |
| Order Number | 71293861000 |
| Product Number | 7 129 38 61 00 0 |
| Battery Voltage | 18 V |
| Battery Capacity | 4 Ah |
| Battery Quantity | 2 |
| Battery Type | Li-ion |
| Battery Compatibility | Li-ion / ProCORE Li-ion |
| Battery Interface | 18V AMPShare |
| Motor Type | DC Motor |
| Oscillation Rate | 11,000–18,500 OPM |
| Tool Holder | StarlockPlus |
| Tool Change System | QuickIN |
| Oscillation Angle | 2 × 1.7° |
| Speed Control | Variable Electronic Speed Control |
| Gearbox | Metal |
| Charger | GAL 1880 CV AS Rapid Charger |
| Storage Case | L-BOXX 136 |
| Weight Without Battery | 1.30 kg |
| Sound Pressure Level | 80.7 dB |
| Sound Power Level | 88.7 dB |
| Peak Sound Level | 93 dB |


















