The Hammer Gloves are a pair of knuckle duster-like gauntlets with red stripes, each connected to a green metal bracelet respectively. When obtained, they allow Knuckles' attacks to destroy Steel Containers. Using this Level Up Item leaves a red energy trail when punching. This is a required Level Up Item.
The Hammer Gloves can be found inside the Death Chamber. At the beginning of the stage, the player must hit the hour glass in front of them and a door that leads into a hallway should open. They must then head then into this hallway before the door closes and the Hammer Gloves will be located in the first room on the right after entering the hallway, the entrance of which will be blocked by some Wooden Containers.
In other media
In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, the Hammer Gloves were a piece of equipment invented by Rotor Walrus for Knuckles the Echidna to aid Knuckles after he lost his powers. Although Knuckles managed to make some use of them, he discarded them permanently after he regained his powers.