Scizore

The scizore is a hardened tube that fits over the forearm, ending in a semicircular blade used for devastating bladed punch attacks. The scizore grants a +1 shield bonus to AC, but if you attack with the blade, you lose the AC bonus that round and take a –1 penalty on attack rolls with it. While wearing a scizore, you cannot use that hand for anything else. A scizore provides a +10 bonus to your CMD against being disarmed of your scizore. Donning a scizore is a full-round action.