Champion 540Pc Self Tapping Screw Assortment Assortments Screws Panel Holders & Stands 18760 Impact Extension 1"Dr 250mm18760 18760 Impact Extension 1"Dr 250mm18760 1"Dr Impact Extension 250mm number of recieversUp to 16 Max 13 Sizes: 4G to 10G 540 Pieces Replacement Packs Available Part # Size Pack Qty C540 1 4G x 5 8 Raised Head 40 C540 2 6G x 1 2 Raised Head 50 C540 3 6G x 1 Raised Head 40 C540 4 8G x 3 8 Raised Head 40 C540 5 6G x 3 4 Raised Head 40 C540 6 8G x 1 2 Raised Head 50 C540 7 8G x 1 Raised Head 20 C540 8 8G x 1 1 4 Raised Head 20 C540 9 8G x 1 1 2 Raised Head 20 C540 10 10G x 3 4 Raised Head 20 C540 11 6G x 3 8 Pan Head 50 C540 12 8G x 1 2 Pan Head 30 C540 13 10G x 1 2 Pan Head 20