Google square drill bit for more information.
													
																	How to make square hole in sheet metal. 
									
	
		
	
																	For this step you ll need a compass ink and a center punch. 
																	How to cut a round hole in sheet metal. 
																	I ve tried a 1mm angle grinder disc easy enough to get a square but definitely not a clean one. 
																	Blacksmithing for beginners cutting a square hole in sheet metal. 
															
													
									
	
		
	
																	To hold the carriage bolt in place you need a square hole sized to match the square shoulder of the carriage bolt. 
																	Creating a square hole in material seems like a difficult task but one process creates a square hole in common materials metal wood and plastic without the need for expensive specialty tools. 
																	If you re dealing with sheet metal the previous answer get a proper square punch and die is correct. 
																	Use a hydraulic press to gradually and smoothly increase pressure until the broach is forced through the hole cutting material and forming a square. 
															
													
									
	
		
	
																	Hi guys wondering what is the best way to cut out a square hole say 100x100 mm in 1 8mm sheet. 
																	Insert the broach and ensure it lines up at 90 degrees from the work peice or the hole will be crooked. 
																	Drill a hole in the metal close to but smaller than the finished hole size. 
																	Next use a compass to outline the edge of the hole. 
															
													
									
	
		
	
																	Simple tool to drill square holes. 
																	How to use chisels instead of files to cut a share hole for carriage bolts. 
																	If you want to cut square holes through thicker materal metal or wood then you want a watts brothers bit. 
																	This is a simple diy solution to broaching odd shaped holes in metal. 
															
													
									
	
		
	
																	At first locate the center of the whole. 
																	Is there any tools i can use that ll do a clean job at home. 
																	Follow few steps step 1.