you may consider 6 (or more) as you will find all sorts of items you can now Quick Couple to your Garden Hose

it helps extend the overall service life of the machinery

Flex Plus Guns

It also features a quick-connect collet for easily changing out driver bits

185 Blue Bins

Graco 127707 BUSHING, SDS STYLE, .787" (20 MM) 6-2-cfm you may consider 6 (orSpecifications UPC Product: 00633955677524 Family Code: FAMWPA Country of Origin: US Unit of Measure: EA Height: 4 IN 10. 160 CM Length: 4. 4 IN 11. 176 CM Width: 4. 5 IN 11. 430 CM Volume: . 046 FT3 0. 001 M3 Shipping Weight: 1. 84 LBS 0. 835 KG Technical Specifications System of Measurement Imperial Type Bushing