Amazon has BOSCH HC2084 1/2 In. x 12 In. SDS-plus Bulldog Rotary Hammer Bit on sale for $5.04 . Shipping is free with Prime or on order $25+
- Optimized brazing and hardening process for long life
- 15 percent faster (compared to S4L)
- Bosch-made carbide tip is tougher and more durable under heavy loads
- Proprietary Bosch hardening process results in more holes per bit
- Ideal for anchoring and through-hole applications in concrete
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