WS01 wrist strap is suitable for OrcaTorch D500 and D500V. It is also suitable for flashlight diameter 24-28mm. Friendly Tips: If you are going to use the dive light with this wrist strap, we suggest you make sure attach the light securely to the wrist strap with a landyard. The wrist strap is to free your hand, while the landyard can prevent the light from falling off the wrist strap. Featuring One size suitable for most of flashlights which diameter bettween 24-28mm For use with or without gloves, can be used on left or right hand freely The thickened but soft durable canvas can fix the flashlight with your hand tightly, free your hand in the water, really comfortable Fast dry after use, magic tape design,very easy to operate