Performance Plus Deluxe Ergonomically Designed Drum Key has a curved handle that's easy to hold and gives you additional torque power to your standard square hole 1/4 " drum set lugs and tension rods. The Performance Plus heavy chrome plated die cast steel construction will give you years of service yet is in expensive enough to buy a pack of 50. The Performance Plus DK2 manufactured with a hole for a necklace or a keychain to make sure that you have your drum key everywhere you go. Its makes it strong and durable for drummers and percussionists who are constantly on the go. Fits all 1/4 " standard socket square drum key tension rods and affordable to replace the one you may have lost.