Ribitech SDS+ 4321 Drill Bit for Concrete 600 mm Ø 32 mm

Unfortunately the small stem broke after fourth time of use, it won't take much abuse. Fine. For a DIY chap but no good if your professional trade.

This is a very good quality sds-plus drill bit I've used it very often since I've got it it is still doing great job it is not worn out yet I would definitely recommend buying it

PERFECTLY GOOD DRILL BIT HARD USE DID NOT FAIL

The shaft broke off the first time I used this drill bit so was of no use. Poor design