In 1964, Trevor Peck, a wealthy businessman who owned a hosiery factory in Leicester, also became involved in nut manufacturing. He paid particular attention to producing an object less costly than the MOAC. Peter Biven and his brother Barrie introduced Trevor Peck to climbing in 1951 and the three of them formed a formidable climbing team for many years. The credit goes to Trevor for dreaming up the chock. His Crackers were made from knurled round steel or Duralumin bar cut to the required length. He used steel wire, stronger than small diameter rope, for the smallest sizes. The earliest ones, in which the wire ends were locked and silver soldered into a copper sleeve, were definitely in use in 1962. It was only in 1967 that the wires were swaged with the Talurit ferrule system. There was also a nylon version of the Cracker, the Ny-Chock on tape. Trevor Peck deposited the first patent for nuts in 1965. This was later refused since there was already proof that the MOAC predated the Peck device and left the door open for other innovators. The Peck Crackers were not very successful in England but the American climber Royal Robbins, returning from a trip to England in 1966, took back to the USA not only a few samples but also his experience of the art of placing passive protection. In his excellent book, Advanced Rockcraft, a superb photo by John Cleare shows Peter Biven using a Cracker on the « Coal Face » at Bosigran. Unfortunately, Trevor Peck passed away prematurely in 1969 and was not able to develop his company, Peck Climbing Equipment.

In 1964 or was it 63, in a cottage in the Peak District, then home of Tony Howard, a hobby was born which was later to become a company of international repute. With his friend Alan Waterhouse, Tony Howard marketed sets of Wedges under the brand name of Troll. Not far from there, Paul Seddon, master of his castle in his own small enterprise Parba, was asked in 1965 by Ellis Brigham to manufacture new nuts to be sold in his store in Manchester.

Paul Seddon cut his prototypes in a 25 mm by 20 mm bar of aluminium alloy that he was going to use, by a coincidence, for a future piton... Angled at 14 degrees and drilled transversely with a simple 8 mm hole, these nuts were delivered, under the name of Spud, to Ellis Brigham in October 1965. Later on, Spuds of different sizes were manufactured. Paul Seddon did not stop there. In 1968 he produced what were probably the first nuts for wide cracks, the Big-H, which were cut from an H-section extrusion. Later in 1967, at Troll, an extruded bar in the shape of a « T » gave birth to the Tee Chock. In 1970, Paul Seddon teamed up with Tony Howard and Alan Waterhouse and became the third « troll ».

In 1966, in the long-abandoned cinema of Deiniolen (Wales), Denny Moorhouse and Shirley Smith, two original personalities, created the most mythical factory of climbing hardware, Clogwyn Climbing Gear. At that time, a day on which they produced 24 nuts was reckoned to be a good one! At the end of that year, Denny Moorhouse made his first Hexagons which inspired many later on. The size 7 was called Jumbo, the size 8 Mammoth! In few years, Clog became the generic word for nut in the language of climbers around the world.