The Alpen Sds Max - Sds Plus Adaptor Is An Accessory Designed To Convert A Sds Max Tool To Be Compatible With Sds Plus Drill Bits. Here'S A Breakdown Of Its Features:Sds Max To Sds Plus Conversion: The Adaptor Allows You To Use Sds Plus Drill Bits, Which Are Generally Smaller And More Commonly Used In Lighter-Duty Drills, With A Tool That Accepts Sds Max Shanks, Which Are Typically Used In Heavier-Duty Rotary Hammers.Alpen Brand: Known For Producing High-Quality Tools And Accessories, This Adaptor Is Made To Be Durable And Reliable, Ensuring A Secure Fit Between The Tool And The Drill Bit.Compatibility: The Adaptor Fits Securely Into Sds Max Tools, Making It Versatile And Allowing The User To Work With A Wider Range Of Drill Bits Without Needing To Purchase A New Tool.This Adaptor Is Typically Used In Construction, Masonry, And Other Industrial Applications Where You Need The Flexibility To Switch Between Sds Max And Sds Plus Bits.