The forstner bit is by far the best drill bit to use for your Spring-Bolt projects. It reliably and easily drills time after time clean and straight holes in cross or end grain timber, whether hardwood or softwood. There are cheaper alternatives you could use, but in the long run you will be glad you didn’t. If you are a professional fitter you will need the confidence the forstner bit gives you to drill the required holes perfectly. If you are a DIY enthusiast the forstner bit will make you look and perform like a professional.
 
Specification.
 
Precision Carbon steel.
35mm head diameter.
12.7mm shank.
145mm overall length.
Max recommended speed 575rpm