The Stiletto TBS-R is a 4 oz replacement smooth hammer face for TBII-15 model hammers. The replacement hammer face has a durable steel smooth face for trim and finished visible woodwork. The replacement kit contains a replacement steel face, bolt, hex key, lock-washer, Loctite bottle, instructions and leather washer part (for older t-bones). The TBS-R replacement face is made of heat treated high-carbon steel for long service life.