These 20mm bench dogs feature a 30mm diameter, height adjustable and lockable non-slip pad. The dogs fit perfectly in a 20mm chamfered dog hole. The adjustment allows you to use them for levelling, supporting uneven work pieces or those with a height differential. Each dog is individually adjustable. A locking ring ensures complete stability. The minimum height is 20mm, the maximum 29mm. The high friction anti-slip pads keep your work in place. Fits to any 20mm dog hole in a Parf system bench. Multifonction bench or MFT. Supplied in a pack of 4.-bg