It fits on 1/2-inch external square drive and is suitable for rotary hammers with SDS plus shank systems The SDS plus Adapter is highly robust and is specially designed to withstand the high power of rotary hammers. Its S2 Modified Steel and optimised heat-treatment process provide the adapter with extra endurance for high performance, making it extremely sturdy for long-lasting work. This makes the product ideal for heavy-duty screw-driving applications such as plant installations or heavy industrial work. .