Either too heavy a hammer or the wrong type of hammer may have been used.

• A 1-lb. hammer is recommended with the Standard Staple Driver.
• A 2-lb. hammer is recommended with the Quad Staple Driver.
• A dead blow, soft steel, or rubber hammer should not be used.

The guide blocks may be worn, allowing too much play for the staple driver.

The initial hit with the hammer may have been too hard.

• Starting with a moderate blow, hit driver with three to five consecutive blows, each blow harder than the previous one.

Anvils in the Alligator^® RSC187 Tool may be worn or broken.

• Inspect for deep/worn pockets and chipped/worn walls in angled areas of the anvils.

A mild steel plate may have been used for 'Final Set' procedure.

• Use only a hardened steel plate, such as the Flexco ST-28, when performing the 'Final Set' procedure of the Ready Set fasteners.