IVY Classic 44030 2-Inch #2 Phillips Power Bit, Impact Plus, 10-Piece Contractor Pack High-grade S-2 Tool Steel for extra strength and durability Designed to withstand the high torque (rotational force) of impact drivers, Impact Plus (Registered Trademark) Heat treated and tempered to Rockwell Hardness 60 - 62, sandblasted finish prevents rust Precision machined for ideal fit and superior holding power Length: 2-inch, Size: Phillips #2, Shank: 1/4-inch hex power, Convenient snap-open contractor pack