Milwaukee 48-89-9257 SHOCKWAVE Impact Duty Electrical Kit (#1, #4, #9) Milwaukee 48-89-9257 SHOCKWAVE Impact Duty Electrical Kit (#1, #4, #9) is engineered to deliver the most durable and fastest impact step bit hole drilling solution. Milwaukee 48-89-9257 SHOCKWAVE Impact Duty Electrical Kit (#1, #4, #9) is made in the USA with global materials and give you best-in-class performance in impact drivers with the versatility to be used in drills.

The 1/4” hex shank has an optimized SHOCKZONE body providing you with the industrys most durable shank, reducing early shank breaks. A Titanium Aluminum Nitride (TiAlN) coating helps deliver you 5x longer life, while the step drill bit’s Rapid Strike tip and dual spiral flute produce 2x faster holes. Milwaukee 48-89-9257 SHOCKWAVE Impact Duty Electrical Kit (#1, #4, #9) features the #1 1/8 – 1/2”, #4 3/16 – 7/8″, and #9 7/8″ &1-1/8″ step bits with laser engraving for a clear stop on size identification.