2Set Musical instrument accessories: 1 set x cymbal sleeves with base & 1 set x Standard Drum Key Great to have on hand for gigs and rehearsals. Wing nuts are made of stainless steel, Cymbal felts are made of high quality felt. & long service life. Emergency Kit for Drummers - Makes a Great Stocking Stuffer! A type: Drum Key are made of high quality chrome-plated steel construction. Industry standard for all drums with 1/4 inch socket square tension rods Includes 3 standard drum keys, and 1 continuous motion speed drum key Perfect for all drums with standard 1/4 inch socket square tension rods. The camber design of the continuous motion key makes it Perfect for quickly and easily removing and replacing drumheads. B type: Butterfly nut size: 41 x 20 x 12mm Internal diameter of about 8mm, can be connected to the M8 screw rod Gasket size: 8 x 24 x 2mm (inner diameter x outer diameter x thickness) Casing size: 38 x 38 x 26mm The inner diameter is about 8.8mm Medium felt pad size: outer diameter 40mm, inner diameter 10mm, height about 15mm colour: black+Silver Material: stainless steel+Plastic+chemical fiber felt+Chrome-Plated Steel Package Contents: 2 x cymbal sleeves with base 2 x 8mm wing nuts 2 x 8mm washers 4 x cymbal felts 3 x Standard Drum Key 1 x Continuous Motion Speed Drum Key Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.