"Having looked at a number of other high street suppliers, I was very pleased to find this SDS bit at my local SCREWFIX. I needed a longer than normal 5mm SDS bit to fit a KEYSAFE to the outside of an elderly person's flat, and the only bit I had was the standard 110mm. In fact, most other suppliers only stock the shorter length in 5mm SDS bits. This particular bit was a godsend - excellent quality and more than long enough to tackle some very dense concrete at the ground floor of a 10 storey high-rise block of flats. My only gripe, and it is minor, is that the bit was shrink-wrapped and the plastic coating was very hard to remove. But at this price, it is a really excellent purchase. Quality and value for much less than anywhere else that I could find. Recommended."