PEAK's Material Clip is provided with 2 sizes of coil to grip a wider range of materials better. PEAK's straight coil design works better than a conventional wrapped spring, which results in the spring coils forming an inverted "V". PEAK's straight coil results in parallel slits which will hold your materials more securely. The PEAK Material Clip will fit 1/4" diameter shafts. Clips will rotate to any angle needed or completely out of the way and multiple Material Clips can be used in tandem.