Features Color: silver. Material: all metal. This 1/4 to 3/8 adapter are exactly as specified and are necessary if you need to mount a camera accessory having a 3/8-16 internal thread to a device like a tripod or QR plate with a 1/4-20 male screw. The cost for a bag of (10) of these machined chrome plated adapters was reasonable, the threads are cut cleanly, the screwdriver slot is deep and well-machined. Easy to use. Compatible with lens plate button heads, arca swiss type button heads etc. Package Contents 4* 1/4" to 3/8" convert screw adapters