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 Count

Amazon Basics Drill and Driver Multi-Bit Set, 100 Count

Product ID: 309416784

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Details

Material
Alloy Steel
Finish type
Steel
Shank type
Hex
Brand
Amazon Basics
Item dimensions L x W x H
27 x 13 x 7

🎒compact, organized carry case

🔩100 versatile bits & sockets

🛠️durable alloy steel build

Description

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

BUILT TO LAST - Wear-resistant alloy steel with quenching treatment ensures long-term durability
ORGANIZED MOBILITY - Sturdy plastic case keeps your bits sorted and travel-ready
READY FOR ANYTHING - 4 hole saws and 8 nut sockets expand your toolkit’s versatility
PRECISION CONTROL - Includes magnetic bit holder for secure, effortless bit changes
ALL IN ONE POWERHOUSE - 100-piece set covers metal, wood, plastic & masonry for every project

The Amazon Basics Drill and Driver Multi-Bit Set offers 100 durable, alloy steel pieces including 52 bits, 8 nut sockets, a magnetic bit holder, and 4 hole saws, all housed in a sturdy, portable case. Designed for versatility across metal, wood, plastic, and masonry, this set is engineered for professionals and enthusiasts seeking reliable, all-in-one tool readiness.

Specifications

Manufacturer	Amazon Basics
Part Number	DS-DB100
Product Dimensions	27 x 13 x 7.01 cm; 1.83 kg
Item model number	DS-DB100
Size	100 Count
Style	Bit Set
Finish	Steel
Material	Alloy Steel
Item Package Quantity	1
Number of Pieces	100
Compatible fastener range	Screws and bolts
Batteries Required?	No
Item Weight	1.83 kg

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