Quickie Slider Nuts work well in pin scars. They came in six sizes and in at leat two generations. The first generation used dipped plastic to protect the carabiner loop, while the second used plastic tubing. The nut dimensions were different for the two generations.

Donald applied for a patent for his Quickeys (described as an "Expandable Piton") on August 6, 1986 and received U. S. Patent #4,715,568 on December 29, 1987.

↑ Set 672-673: D. Best Mountaineering Quickies #1–#3

• Made in USA [1987].
• These 1986 second generation Quickies have clear plastic tubing for the carabiner loop end.

↑ 672: D. Best Mountaineering Quickie #1: 8 mm.

• Made in USA [1986].
• This 1986 second generation Quickie has clear plastic tubing for the carabiner loop end. The stamped "MH "are the intials of previous owner Michael Hartley.

↑ 673: D. Best Mountaineering Quickie #3: 12 mm.

• Made in USA [1986].
• This 1986 second generation Quickie has clear plastic tubing for the carabiner loop end. The stamped "MH "are the intials of previous owner Michael Hartley.

↑ Set 655-656: D. Best Mountaineering Quickies #1–#2

• Made in USA [1987].
• These 1987 second generation Quickies have color-coded plastic tubing for the carabiner loop end.

↑ 655: D. Best Mountaineering Quickie #1: 8 mm.

• Made in USA [1987].
• This 1987 second generation Quickie has color-coded plastic tubing for the carabiner loop end.

↑ 656: D. Best Mountaineering Quickie #2: 10 mm.

• Made in USA [1987].
• This 1987 second generation has Quickie color-coded plastic tubing for the carabiner loop end.