The Greatest Hits Screw-On Bouldering Hold Set - 40 Pack by Metolius. Final SALE: For safety reasons, we cannot accept returns on load-bearing Climbing equipment. Sorry for being so mean. Features of the Greatest Hits Screw-On Bouldering Hold Set - 40 Pack by Metolius Purchase larger quantities of holds at lower pricing Random selection of shapes within the given hold size Includes hardwAre Assortment of 40 Screw- On holds Screws Are included