Durston 1189 Steel Bench Block 300mm x 300mm x 20mm

This massive steel bench block from Durston Tools weighs close to 38 lbs (17.3 Kilos) and measures 11-7/8" x 11-7/8" x ¾" (300mm x 300mm x 20mm).  Perfectly flat hardened tool steel.
 

Also known as a Flat Plate, Flat Stake or Swage Block.

The bench blocks are a key workshop tool for flattening. laying out or chasing. Each bench block is constructed out of tool steel, ground flat, polished and hardened. Use with a mallet or hammer to flatten metal or to act as a hard plate against a piece of metal for texturing or punching. The surface should be kept clean and polished, as any marks will be transferred to the metal's surface.