Does this require soldering for default arduino gpio pins? or can i just directly plug it into the arduino?

All of the pins on the Arduino Uno are available on the shield except for the pins used to flash the Arduino.

Are the sda and scl pins accessible through this shield?

Sure, you can see the pins A4 (SDA)，A5(SCL) on the shield.

Will this work with the mega? The product page does not seem to specify if this is for uno or mega etc.

It's compatible with uno board. You can find information directly on the wiki page: https://wiki.keyestudio.com/Ks0252_keyestudio_Proto_Screw_Shield_for_Arduino

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KEYESTUDIO KEYESTUDIO Proto Screw Shield Assembled Bindingpost Proto Shield for Arduino

KEYESTUDIO KEYESTUDIO Proto Screw Shield Assembled Bindingpost Proto Shield for Arduino

Product ID: 284109161

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Details

Brand
KEYESTUDIO
Graphics card description
Dedicated
Model name
KEYESTUDIO
Colour
option 1
RAM memory maximum size
1 GB
Human interface input
Buttons

🔌Double-sided PCB prototyping area

🔩High-quality terminal blocks

🛠️Compatible with Arduino R3 boards

Description

🔧 Prototype like a pro — connect, create, and conquer your Arduino projects!

BUILT IN RESET STATUS - Stay in control with an integrated reset button and D13 LED indicator for real-time debugging and convenience.
COMPACT BREADBOARD READY - Place a small breadboard right in the middle for instant prototyping extensions without clutter.
DUAL SIDED PROTOTYPING POWER - Maximize your creativity with a double-sided PCB area that lets you solder components front and back for complex circuit designs.
SEAMLESS ARDUINO INTEGRATION - Perfectly compatible with Arduino R3 boards and Proto Shields, enabling smooth expansion and experimentation.
EFFORTLESS TERMINAL CONNECTIONS - Say goodbye to tangled jumper wires with reliable screw terminal blocks designed for quick, secure Arduino IO hookups.

The KEYESTUDIO Proto Screw Shield is a versatile Arduino expansion board combining high-quality screw terminal blocks with a double-sided prototyping PCB. Designed for Arduino R3 compatibility, it simplifies wiring, supports soldered components on both sides, and accommodates a small breadboard for flexible experimentation. Featuring a reset button and D13 LED indicator, it’s the ultimate tool for streamlined, professional-grade prototyping.

Specifications

Brand	KEYESTUDIO
Product Dimensions	7.49 x 6.3 x 1.5 cm; 18.14 g
Item model number	KS0252
Manufacturer	keyes
Series	KEYESTUDIO KEYE STDIO
Color	option 1
Processor Count	1
Computer Memory Type	DDR3 SDRAM
Maximum Memory Supported	1 GB
Graphics Card Description	Dedicated
Graphics Card Interface	Integrated
Are Batteries Included	No
Item Weight	18.1 g

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