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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Amazon Basics Drill and Driver Multi-Bit Set - 100-Piece

Amazon Basics Drill and Driver Multi-Bit Set - 100-Piece

Product ID: 369320440

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Details

Material
Alloy Steel
Finish type
Steel
Shank type
Hex
Cutting angle string
118 Degrees
Brand
Amazon Basics

🎯multi-surface precision

🔩100 versatile pieces

🛠️alloy steel durability

Description

🛠️ Unlock your DIY potential with the ultimate drill bit set!

VERSATILE COMPATIBILITY - Fits screws, bolts, nuts of various sizes—your all-in-one solution for any project.
PREMIUM ALLOY STEEL BITS - Engineered with wear-resistant quenching treatment for long-lasting performance.
ORGANIZED PORTABLE CASE - Sturdy plastic case with designated slots for easy transport and zero lost pieces.
COMPLETE 100 PIECE ARSENAL - Everything you need for metal, wood, plastic, masonry & more—no job left behind.
MAGNETIC BIT HOLDER INCLUDED - Secure, quick bit changes that keep your workflow seamless and efficient.

The Amazon Basics 100-Piece Drill and Driver Multi-Bit Set offers a comprehensive collection of durable alloy steel bits, nut sockets, and hole saws designed for precision across multiple materials. Housed in a sturdy, organized case, this set is engineered for professionals and enthusiasts seeking reliable, versatile tools for every project.

Specifications

Manufacturer	Amazon Basics
Part number	DS-DB100
Item Weight	1.83 Kilograms
Product Dimensions	27 x 13 x 7.01 cm; 1.83 kg
Item model number	DS-DB100
Size	One Size
Style	Bit Set
Finish	Steel
Material	Alloy Steel
Item Package Quantity	1
Number Of Pieces	100
Compatible Fastener Range	Screws, Bolts, Nuts (various sizes and drive types)
Batteries Required?	No

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