What additional features can
Although plasterer's hawk designs are quite standard, there are a few extra features which can be worth having.
Some metal hawks have rounded corners to help prevent damage to plasterwork should the edge of the hawk make contact with the work surface (the corners of plastic hawks are generally left square).
Some metal - and more expensive plastic - hawks also have a circular pattern etched into their surface. This helps to stick the load to the plate and stop it from sliding off the hawk.
The best handles on hawks will be have a callus-protector disc at the top where knuckles are vulnerable to being rubbed.