a handheld power tool and a removable accessory , which is changeable without requiring extra tools , include various elements . for example , the handheld power tool includes a platen having an aperture therein and a locking mechanism coupled with the platen . the locking mechanism includes a cam member . the removable accessory includes a tab that fits into the aperture and that is engagable by the cam member to bias the removable accessory into abutting contact with the platen to securely couple the removable accessory with the tool .