SDS max drill bit is intended to drill larger holes and work in more extreme conditions. It is a drill bit that offers higher speed and drills with more power. It is therefore ideal for drilling on hard surfaces and for drilling larger holes.These bits have three open grooves, with a locking segment attached to the grooves rather than locking ballshttp://www.yuerongtool.com/dri....ll-bit/sds-max-drill
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