Butt chisels are made in wider sizes than most chisels, making them efficient for wasting out large areas, such as the mortices for installing butt hinges. They also have shorter blades that some woodworkers find offer improved control. Made from PM-V11 steel alloy, the blades taper from shoulder to tip for strength and rigidity, and have parallel sides and true bevel edges for clearance and minimal friction when working into an angled corner or a tight recess. Each blade is lapped flat. The blade and handle are connected with a tang and a socket-like stainless steel ferrule that seats directly onto the shoulder of the blade, with flats on the tang to prevent the handle from rotating. The hard maple handle has been torrefied, a heating process that changes the structure of the wood at the cellular level, stabilising it against swelling and shrinkage caused by humidity changes. Contoured to fit the hand nicely, the handles have a domed end that resists chipping from glancing mallet blows. Overall lengths range from 7.1/2"(187mm) to 8"(200mm); blade length (including bolster) is about 3"(75mm). The 1/4"(6.35mm) chisel has a 30° primary bevel; the others are 25°. All have 27° micro-bevels and require only final honing before use.