What are the three rings with Allen set screws for?

They are called carbon steel drill depth stop. Put one (of the three sizes) on the drill and tighten it with Allen screwdriver at the depth you decide.

Does it says which is for wood or metal etc?

The bits with the “fins” on the top are for masonry, paddle is for wood and sharp is for metal.

What are the sizes of the hole saw bits?

Stamped on them are: 1 1/4-32mm 1 1/2-38mm 1 3/4-44mm 2 1/8-54mm

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🛠️ Unlock your DIY potential with the ultimate drill & driver arsenal!

ORGANIZED PORTABLE - Sturdy plastic case with designated slots keeps your tools ready to go anywhere.
COMPLETE 100 PIECE SET - Everything you need for metal, wood, plastic, and masonry projects in one sleek kit.
PREMIUM ALLOY STEEL BITS - Engineered for wear resistance and long-lasting precision with quenching treatment.
MAGNETIC BIT HOLDER INCLUDED - Secure your bits effortlessly for faster, more efficient work.
MULTI MATERIAL COMPATIBILITY - From delicate woodwork to tough masonry, this set adapts to every challenge.

The Amazon Basics 100-Piece Drill & Driver Multi Bit Set offers a comprehensive collection of alloy steel bits and accessories designed for versatile use across metal, wood, plastic, and masonry. Featuring 52 drill bits, 8 nut drivers, 4 hole saws, and a magnetic bit holder, all housed in a durable, organized storage case, this set is engineered for durability, precision, and portability—perfect for professionals and DIY enthusiasts aiming to elevate their toolkit.

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Brand	Amazon Basics
Item Length	10.63 Inches
Material	Alloy Steel,Plastic
Finish Type	Steel
Number of Pieces	100
Drive Bit Shank Style	Straight
UPC	672352800562
Global Trade Identification Number	00672352800562
Manufacturer	Amazon
Part Number	DS-DB100
Item Weight	4.04 pounds
Item model number	DS-DB100
Size	100 Piece
Style	Bit Set
Finish	Steel
Item Package Quantity	1
Compatible Fastener Range	Screws (Flathead, Phillips, Torx), Bolts, Nuts ( various sizes)
Batteries Required?	No

Amazon Basics Drill & Driver Multi Bit Set, Alloy Steel Wood Straight Drill Bits, for Metal, Wood, Plastic, Masonry, with Storage Case, 100-Piece

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