has a little screw on the opposite side of the trigger, what is that for?

It's an adjustable valve,you can adjust the speed of the grinding tool by turning this screw.

Can i use it with campbell hausfeld fp209501 110 max psi air compressor? as other belt sanders rated for more powerful compressors.

Yes, it can work with the tool which you mention. But please notice that the standard working pressure of this product is 90PSI, too high or low air pressure will make a poor performance!

Can this sander fit in a 3/4" square opening? To sand off aluminum burrs from the inside of a 1" square tube.

Yes it will do that, but a bit tight as the overall head width is just under 1/2".

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Pneumatic Tool Air Belt Sander,1/4" Air Inlet,Air Belt Sander (3/8" x 13") with 12pc Belts (#40，#60，80#，120#),3/8" Air Belt Grinder For Aluminium, Iron, Steel And Etc. Metal Polishing

Product ID: 369195668

Details

AC adapter current
4.5 Amps
Brand
Minimprover
Grit number
80
Grit type
Coarse Medium
Power source
Air Powered

💨1/4" air inlet for efficient pneumatic power

⚙️14000 RPM high-speed power

🛠️12 versatile sanding belts included

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82832CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡️ Power through projects with precision and style!

ALL IN ONE SANDING KIT - Comes with 12 premium belts (#40 to #120 grit) to tackle any surface or project.
RUST CORROSION RESISTANT - Crafted from high-quality stainless steel to ensure durability and long-lasting performance.
ERGONOMIC PORTABLE DESIGN - Lightweight 0.9 kg body with a non-slip knurled handle for fatigue-free, secure use.
PRECISION AT LIGHTNING SPEED - Experience ultra-fast 14000 RPM grinding for flawless finishes every time.
VERSATILE METAL MATERIAL MASTERY - Perfect for aluminum, steel, copper, plastics, wood, and more—polish, grind, and deburr like a pro.

The Minimprover Pneumatic Air Belt Sander delivers 14000 RPM of high-speed, air-powered grinding with a compact 0.9 kg stainless steel body. Equipped with 12 sanding belts ranging from coarse to fine grit, it’s engineered for versatile use on metals, plastics, wood, and more. Its ergonomic, non-slip handle and rust-resistant construction make it a durable, professional-grade tool designed for efficiency and comfort in demanding industrial and craft applications.

Specifications

ASIN	B08C6Z6LS3
ASIN	B08C6Z6LS3
Amperage Capacity	4.5 Amps
Battery Description	Air Powered
Best Sellers Rank	#66,108 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Power Belt Sanders
Brand Name	Minimprover
Customer Reviews	4.0 4.0 out of 5 stars (290)
Customer reviews	4.0 4.0 out of 5 stars (290)
Date First Available	20 July 2020
Grit Number	80
Grit Type	Coarse, Medium, Fine, Very Fine
Item Weight	0.99 Kilograms
Item model number	4a0eeab9-1477-4b8a-8f7d-036712c543d3
Manufacturer	Minimprover
Manufacturer	Minimprover
Manufacturer Part Number	H042-14
Maximum Rotational Speed	14000 RPM
Model Number	4a0eeab9-1477-4b8a-8f7d-036712c543d3
Package Dimensions	34.3 x 10.4 x 7.4 cm; 990 g
Power Source	Air Powered
UPC	779605311391

Reviews

J**N

I love the smaller size compared to my 1/2" x 8". The size, feel, fit, finish is all good. Packaging and shipping were also good.

23.02.2026

M**T

tanks

29.02.2024

I**D

Real great tool

17.03.2024

B**L

looks well made, but seriously lacks power

1.04.2023

C**O

no fault of the tool but i wish i had bought a wider belt tool

4.09.2025

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82832CFA

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In stock

Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Senegal.

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TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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