Milwaukee Tool 48-32-4772 SHOCKWAVE, Impact Duty 2" Square Recess #2 Power Bits Bulk 25

It is a #2 square recess tip, the common Robertson size used on most deck screws, drywall-to-steel screws, and cabinet and electrical panel screws. A #1 square is smaller and a #3 larger, so the bit will cam out or sit loose if your screws are not #2. The size is laser etched on the bit so it is readable once it is mixed in with the rest of your bits.

Both are 2-inch driver bits, but they drive different fastener heads. The Milwaukee 48-32-4772 is a square recess #2 power bit, so it seats in square-drive (Robertson-style) screws commonly used in deck, cabinet and electrical work. The Rack-A-Tiers 70462RY is a hexagonal magnetic driver bit from the Malco C-Rhex series, intended for hex-head fasteners such as sheet metal and duct screws, and its magnetism holds the fastener on the bit. If the screws on your job have a square recess, the Milwaukee bit is the match; if they have hex heads, the hex driver is.

As a 2 inch power bit it seats directly in the 1/4 inch hex collet of an impact driver, so no holder is required. A holder is only worth adding if you want magnetic screw retention. If magnetic hold is what you are after, the Rack-A-Tiers 70462RY is a 2 inch hexagonal magnetic driver bit in the C-Rhex series, though that is a hex drive bit, not a #2 square recess.

It is a bulk pack of 25 of the same 2 inch #2 square recess power bit, which is how crews and MRO stockrooms buy them rather than in a retail blister of two or three. Ordering is by model 48-32-4772.

No. It is not an interchangeable tip. The Milwaukee 48-32-4772 is built for impact drivers and drill drivers with a SHOCKZONE shank tuned to absorb peak torque, and it carries a #2 square recess tip. The Rack-A-Tiers 70462RY is a hexagonal magnetic driver bit in the C-Rhex series, so it drives a different fastener head entirely. Match the bit to the screw head rather than treating the two as substitutes.

Stripping usually comes from a tip that is a loose fit in the recess, so the bit rocks and chews the socket. The SHOCKWAVE #2 square bit uses customized tip geometry for a tighter fit and less stripping, plus a wear guard and custom heat treat on the tip for life. It will not rescue screws that are already rounded out, but it cuts cam-out on fresh fasteners.

A proprietary steel with a custom heat treat, which is what lets the tip hold up to repeated impact blows while the SHOCKZONE section of the shank flexes instead of fracturing. Country of origin is Vietnam.