So, how are these wedges placed in their respective hole? Does one have to place it so the "split" follows the desired line? Alignment/mechanism?

Yes. Figure out how you want the split to run and then place your wedges so it splits the rock in that direction as the wedges push apart the feathers. Two things I learned: Make your holes 5/8", not 3/4". I tried 3/4" holes and it didn't work as well. Also make sure you drill your holes deep enough. It's a bummer if your wedges bottom out in the hole before the split begins. Other than that, it's amazing ancient technology at work.

How deep of a hole do you drill? The description says 1.5” but this seems very shallow considering the shim is 4.5” long.

The shoulders of the outer shims sit near the top of the hole and there has to be room for the wedge to go right through without bottoming out. Looking at the dimensions in the diagram about 4" minimum depth. If the wedge does hit the bottom it can be extracted by drilling a second hole alongside but it's best to avoid that. The description also says a hole 0.5" diameter and that's wrong too.

Some of the shims have bent at the narrow place and then broken off. How does one get replacements?

Buy more, there’re cheap👍🏼👍🏼

Wedge is approximately 4-1/4" long.

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10 Packs of Heavy Duty Wedge and Feather Shims, Abuff 5/8 Inch Plug Shim and Wedge Concrete Rock Stone Splitter Hand Tools

10 Packs of Heavy Duty Wedge and Feather Shims, Abuff 5/8 Inch Plug Shim and Wedge Concrete Rock Stone Splitter Hand Tools

Product ID: 81913401

Details

Blade Edge
Straight
Blade Material
Carbide
Brand
ABuff
Handle Material
Rubber
Size
5/8 Inch

🔩High hardness steel

⚙️Precision 5/8 inch size

🛠️10-pack heavy-duty set

52938CFA

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Description

🛠️ Split with confidence, build with pride.

COMPLETE 10 PACK SET - Always have the right tool on hand for any project scale or emergency fix.
ERGONOMIC SAFE HANDLING - Designed for secure grip and maximum control during intense splitting tasks.
PREMIUM HEAT TREATED STEEL - Durability and toughness that withstands the toughest masonry jobs.
TRUSTED BY PROS DI YERS ALIKE - Join thousands of satisfied users who rate it 4.5 stars for reliability and performance.
ENGINEERED FOR PRECISION SPLITTING - Achieve flawless stone, granite, and concrete splits with exact 5/8 inch wedges.

The Abuff 10-Pack Heavy Duty Wedge and Feather Shims are precision-engineered 5/8 inch metal tools crafted from heat-treated steel for exceptional hardness and toughness. Ideal for splitting stone, granite, marble, and concrete by hand, this set offers professional-grade durability and control, making it a must-have for serious masons and DIY enthusiasts alike.

Specifications

ASIN	B07F7Y1T5X
Best Sellers Rank	#106,083 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #37 in Masonry Chisels
Blade Edge	Straight
Blade Material	Carbide
Brand Name	ABuff
Customer Reviews	4.5 4.5 out of 5 stars (456)
Handle Material	Rubber
Item Dimensions L x W	4"L x 4"W
Item Weight	16 ounces
Manufacturer	abuff
Manufacturer Part Number	ABUS-shimwedge-10pcs-blk-180704
Model Number	ABUS-shimwedge-10pcs-blk-180704
Set Name	10 Pack Wedge and Feather Shims
Size	5/8 Inch
UPC	663585691485
Unit Count	10 Count

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52938CFA

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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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