Performance Plus DK2-5 Deluxe Drum Key - Steel Die Cast Ergonomic Design - Bag of 5 Deluxe Ergonomically Designed Drum Key - fits Most Drums High Quality. Chrome Plated Die Cast Steel Construction is Curved for Ultimate Tuning Grip. Compatible with Most Drum Tension Rods for Easy Tuning. Fits all 1/4 " Standard Socket Square Drum Key Tension Rods. Includes a hole in the handle so you can mount it on your key chain.