Milwaukee
Milwaukee 43 in. Max-Lok Spline Adapter
Best reach extender for professionals drilling deep holes in concrete.
Extend the reach of your SDS-MAX rotary hammer bits with the Milwaukee 43 in. Max-Lok Spline Adapter. This adapter allows you to drill deeper and access challenging areas, maintaining optimal drilling productivity thanks to its design for efficient energy transfer. It offers a secure twist and lock connection, ensuring stability during operation. While this adapter is designed for SDS-MAX bits, it can be made compatible with SDS-PLUS or spline shanks using separately sold connection adapters, providing a versatile solution for various job site needs.
$52.50
Owner Satisfaction
4.7
/ 5
Category Rank
2
/ 255
#2 in Adapters
Price vs Category Average
+60%
Above average
Length
43.
/ in
Who it's for
- Tradespeople drilling through thick concrete foundations or deep walls
- Contractors needing rapid bit changes on busy job sites
- Professionals requiring durable tools for heavy-duty drilling tasks
Who should skip it
- Budget-conscious buyers seeking affordable, basic extension solutions
- Users invested in standard, non-proprietary drilling equipment
- Operators sensitive to tool weight and physical fatigue
Performance breakdown
Reach extension
Adds significant depth for drilling through thick concrete and masonry walls.
Connection security
The twist and lock mechanism keeps bits firmly seated under load.
Energy transfer
Maintains high impact efficiency despite the extended length of the tool.
System versatility
Adapts to various shank types when using the necessary additional connectors.
Build durability
Rugged construction withstands the high-torque demands of heavy-duty rotary hammers.
Ease of setup
Quick bit changes are intuitive but require specific adapters for non-MAX shanks.
Key Specs
Length
43 in.
Tool Shank
Spline
Type
Adapter / Extension
Compatibility
SDS-MAX core and drill bits
Optional adapters required for SDS-PLUS or spline shanks
Features
- Extends SDS-MAX bits by 43 inches
- Secure Max-Lok twist and lock system
- Maintains drilling productivity
- Allows use of shorter bits
- Compatible with SDS-MAX bits
- Optional adapters for SDS-PLUS/spline
What customers say
The Milwaukee Max Lok Spline Adapter earns high marks for its exceptional quality and seamless ease of use. Professionals consistently appreciate the robust construction, noting that the adapter handles heavy duty demands reliably without any connection issues. This essential component integrates perfectly into the Max Lok system, simplifying jobsite transitions and confirming its strong value proposition for serious users.
Know before you buy
Yes, this adapter is specifically designed to work with SDS-MAX core and drill bits. It provides a secure connection to extend your reach by 43 inches.
The adapter is natively built for SDS-MAX, but you can use it with SDS-PLUS or spline shanks if you purchase the additional, separately sold connection adapters.
The Max-Lok system is engineered for efficient energy transfer, which helps maintain your drilling productivity even when working at the full 43-inch extension.
The adapter features a twist and lock mechanism that creates a stable, secure connection, ensuring the bit stays firmly in place during operation.
This is a spline-shank adapter designed for rotary hammers that accept spline-style bits. As long as your tool uses a spline drive, it should be compatible.
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$52