Experience maximum force with The Thor 20-2020 Thorace Dead Blow Hammer The Thor 20-2020 Thorace Dead Blow Nylon Hammer is designed to minimise damage to the struck surface. This model has a cavity inside the head partially filled with steel shot which adds to the weight, preventing rebound whilst delivering \'dead\' blows of maximum force. Toolstop stocks this model in a range of different weights/sizes. Features: All faces are one-piece moulded Faces are designed to wear and to be replaced by hand No metal pegs or inserts to damage the workpiece when worn Serrations in the metal head prevent faces from coming loose during use Faces have a shoulder for extra strength and to prevent a fracture from misdirected blows Specification: Model: 20-2020 Weight: 1850g / 4lb Face diameter: 63mm / 2. 1/2 Inch Approximate Length: 370mm / 14. 1/4 Inch