Zinc passivated steel drop scraper head that locks into position over obstructive material, allowing it to be dragged back towards the user. Ideal for cleaning out gutters and larger diameter drains. Compatible with Silverline Drain Rod sets and most third party sets. Head diameter: 100mm. 16mm bore. Zinc passivated steel drop scraper head that locks into position over obstructive material, allowing it to be dragged back towards the user. Ideal for cleaning out gutters and larger diameter drains. Compatible with Silverline Drain Rod sets and most third party sets. Head diameter: 100mm. 16mm bore.