The Siser® Blade Holder is compatible with both 45° and 60° blades that can be used with all Siser cutting systems to cut a vast assortment of materials. Made from anodized aluminum. Simply twist the inner ring to be able to adjust the amount of blade exposed with the main screw then tighten the ring to lock the blade in position. Place the blade holder in the tool holder and you're ready to cut all kinds of projects. The blade holder includes an inner magnet so a new blade clicks in quickly.