The Screw Loose Black Alloy MONSTER Case is a 1300 piece bulk m3 hardware kit. Perfect for multiple custom builds and maintenance for a variety of R/C trucks and cars. This Black Alloy MONSTER Kit includes both of our smaller Black Alloy 650 pcs kits, BHCS (button head) and SHCS (socket head cap). 300 combined SS nylon locknuts and 200 flat washers. We start with 400 BHCS screws which include 50 pieces each of the following m3 button head lengths: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 20mm and 25mm. PLUS it includes 400 SHCS screws that include 50 pieces each of the following m3 cap head lengths: 8mm, 10mm, 12mm, 14mm, 16mm, 20mm, 25mm and 30mm. All black hardware is 12.9 class black oxide alloy. The nyloc locknuts and flat washers are A-2 (18.8) stainless steel and this kit comes with a LARGE hardware case.