2 Set Musical Instrument Accessories: 1 Set x Cymbal Sleeves with Base and 1 Set x Standard Drum WrenchGreat to have on hand for gigs and rehearsals. The wing nuts are made of stainless steel, the disc felts are made of high-quality felt. Durable and long service life. An emergency kit for drummers is a great gift! Type: Wrench Drum are made of high quality chrome plated steel galvanized construction. Industry Standard for All 1/4 Inch Square Bar DrumsIncludes 3 Standard Drum Keys and 1 Continuous Motion Drum KeyIdeal for all drums with standard 1/4 inch diameter tension bars. The spinning camber design of the continuous key movement makes it ideal for quick and easy removal and lower legs. Type B:Wing nut size: 41x20x12mm Inner diameter about 8mm, can be connected to M8 threaded rodGasket size: 8x24x2mm (inner diameter x outer diameter x thickness)Housing size: 38x38x26mm Inner diameter is about 8.8mm Average felt washer size: outer diameter 40mm, inner diameter 10mm, height about 15mm Color: black + silver Material: stainless steel + plastic + chemical fiber felt + chrome galvanized steel Content Packaging: 2 x Disc Sleeves with Base 2x8mm Wing Nuts 2x8mm Washers 4 x Felt Plates 3 x Standard Drum Wrench 1 x Continuous Movement Speed Drum Key Only the above packet contents